Multiple Choice
The figure below shows the change that occurs in two muscles when the arm goes from a bent to a straight position. 
For this to occur,
A) the triceps contracts and the biceps relaxes.
B) the biceps contracts and the triceps relaxes.
C) both the biceps and the triceps contract.
D) both the biceps and the triceps relax.
Correct Answer:
Verified
Correct Answer:
Verified
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