Question

Which of the following is a correctly punctuated compound sentence?

A. I've decided to run a 5K race; but running a long race requires training.
B. I plan on taking two rest days per week and this will help me avoid injury.
C. I'll run long distances on the weekend, and rest on the following day.
D. Running a 5K race would be a great accomplishment, and exercise will improve my health.

Answer 1

The correctly punctuated compound sentence is D: Running a 5K race would be a great accomplishment, and exercise will improve my health.

Step-by-step explanation:

In the given options, the correctly punctuated compound sentence is: D. Running a 5K race would be a great accomplishment, and exercise will improve my health.

A compound sentence consists of two independent clauses joined by a coordinating conjunction (and, but, or, etc.) and a comma. In option D, the two independent clauses, 'Running a 5K race would be a great accomplishment' and 'exercise will improve my health', are joined by the coordinating conjunction 'and' with a comma before it.