In which sentence should a comma be placed?

Question

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In which sentence should a comma be placed? - briefly
A comma should be placed in a sentence to separate independent clauses when they are joined by coordinating conjunctions such as &#34;and,&#34; &#34;but,&#34; or &#34;or.&#34; Additionally, commas are used to set off introductory elements, non-restrictive clauses, and items in a list.
For example:

&#34;I went to the store, and I bought some apples.&#34;
&#34;Although it was raining, we decided to go to the park.&#34;
&#34;The book, which was published last year, became a bestseller.&#34;
&#34;I need to buy apples, bananas, and oranges.&#34;

In which sentence should a comma be placed? - in detail
Commas are essential punctuation marks that help to clarify the meaning of a sentence by separating its elements. Understanding where to place a comma is crucial for maintaining grammatical accuracy and ensuring that the intended message is conveyed effectively. There are several rules and guidelines that dictate the appropriate use of commas in English sentences.
One fundamental rule is the use of commas to separate items in a list. When listing three or more items, commas should be placed between each item to enhance readability. For example, in the sentence &#34;I need to buy apples, oranges, and bananas,&#34; commas are used to separate each fruit in the list. This rule applies regardless of whether the list is part of a simple or complex sentence.
Another important use of commas is to set off introductory phrases or clauses. Introductory phrases often provide additional information or set the stage for the main part of the sentence. For instance, in the sentence &#34;After finishing her homework, she went to the park,&#34; a comma is placed after the introductory phrase &#34;After finishing her homework&#34; to separate it from the main clause. This practice helps to avoid confusion and makes the sentence easier to understand.
Commas are also used to separate independent clauses in a compound sentence. An independent clause is a group of words that can stand alone as a complete sentence. When two independent clauses are joined by a coordinating conjunction (for, and, nor, but, or, yet, so), a comma should precede the conjunction. For example, in the sentence &#34;I wanted to go to the beach, but it started raining,&#34; a comma is placed before &#34;but&#34; to separate the two independent clauses.
Additionally, commas are used to set off parenthetical expressions. Parenthetical expressions are words or phrases that provide additional information but are not essential to the meaning of the sentence. These expressions can be set off by commas to indicate that they are not integral to the main sentence structure. For instance, in the sentence &#34;My friend, who lives next door, is coming over,&#34; the phrase &#34;who lives next door&#34; is a parenthetical expression that is set off by commas.
Commas are also used to separate coordinate adjectives. Coordinate adjectives are adjectives that modify the same noun and are equally important in describing it. When two or more adjectives modify a noun in the same way, they should be separated by commas. For example, in the sentence &#34;The tall, dark, and handsome man entered the room,&#34; commas are used to separate the adjectives &#34;tall,&#34; &#34;dark,&#34; and &#34;handsome.&#34;
Furthermore, commas are used to set off direct addresses and interjections. Direct addresses are words or phrases used to address someone directly, while interjections are words or phrases that express strong emotion. Both should be set off by commas to indicate that they are separate from the main sentence structure. For example, in the sentence &#34;Yes, I will go to the store,&#34; the interjection &#34;Yes&#34; is set off by a comma, and in the sentence &#34;John, can you help me?&#34; the direct address &#34;John&#34; is set off by a comma.
In summary, commas serve a variety of functions in English sentences, including separating items in a list, setting off introductory phrases, separating independent clauses, setting off parenthetical expressions, separating coordinate adjectives, and setting off direct addresses and interjections. Adhering to these guidelines ensures that sentences are clear, grammatically correct, and easy to understand. Proper comma placement is a fundamental aspect of effective communication and is essential for conveying ideas accurately.