Question

please choose the sentence where commas are used correctly. 1. the mississippi river, which is over 2300 miles long, is the second - longest river in the united states. a. the mississippi river which is over 2300 miles long is the second - longest river in the united states. (no commas) b. the mississippi river, which is over 2300 miles long, is the second - longest river in the united states. c. the mississippi river which is over 2300 miles long, is the second - longest river in the united states. d. the mississippi river, which is over 2300 miles long is the second - longest river in the united states.

Explanation:

In English grammar, a complete sentence with a subject - "The Mississippi River" and a predicate - "is over 2300 miles long, is the second - longest river in the United States" should have proper punctuation. Option a has incorrect comma usage. Option b has no commas where needed for clarity. Option d has an incorrect structure. Option c correctly uses commas to separate the descriptive elements in the sentence.

Answer:

C. The Mississippi River, which is over 2300 miles long, is the second - longest river in the United States.