1. Correct answer: c) I like apples, oranges, and bananas.
Explanation: This sentence correctly uses commas to separate items in a list, including the Oxford comma before "and."
2. Correct answer: b) I wanted to go swimming, but the pool was closed.
Explanation: This sentence correctly uses a comma before the coordinating conjunction "but" to separate two independent clauses.
3. Correct answer: b) Unfortunately, we couldn't find our lost cat.
Explanation: This sentence correctly uses a comma after the introductory word "Unfortunately."
4. Correct answer: c) My best friend, who lives next door, is coming over later.
Explanation: This sentence correctly uses commas to set off the non-essential information "who lives next door."
5. Correct answer: d) The party is on July 4, 2024, at noon.
Explanation: This sentence correctly uses commas to separate the date and year, as well as before the time.
6. Correct answer: c) I'm moving to Portland, Oregon, next month.
Explanation: This sentence correctly uses commas to separate the city and state, as well as after the state before continuing the sentence.
7. Correct answer: b) She wore a long, red silk dress to the party.
Explanation: This sentence correctly uses a comma between the coordinate adjectives "long" and "red." No comma is needed before "silk" as it's not a coordinate adjective.
8. Correct answer: b) The teacher said, "Please open your books to page 42."
Explanation: This sentence correctly uses a comma after the attribution (said) and before the opening quotation mark.
9. Correct answer: b) I love pizza, and my sister prefers pasta.
Explanation: This sentence correctly uses a comma before the coordinating conjunction "and" to separate two independent clauses.
10. Correct answer: c) The old car, which hadn't been driven in years, still ran perfectly.
Explanation: This sentence correctly uses commas to set off the non-essential parenthetical element "which hadn't been driven in years."