When holding a guitar or flute, the elbow joint bends when the

A. triceps muscle contracts.

B. triceps muscle relaxes.

C. biceps muscle contracts.

D. biceps muscle relaxes.

Answer: bro it's C

Explanation:

and cuz I didn't copy

C. biceps muscle contracts

Explanation:

Answers for the quick check are

B: B

D: The muscle would continue to contract uncontrollably.

A: The muscle would be permanently relaxed.

C: biceps muscle contracts.

B: smooth muscles