Question

Which sentence is a compound sentence?

A. He was in the race, but he did not win a prize.
B. The swimmers and the scientists traded information about their
work.
C. The scientists were happy that their work had helped with
improving swimming.
D. Many swimmers who worked with NASA set world records in the
suits.

Answer 1

The answer is for sure A

Answer 2

A. He was in the race, but he did not win a prize.

Step-by-step explanation:

two independent clauses connected with a comma and a coordinating conjunction