Explanation:
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They must contract and relax to move the bones for movement
I would say the answer is C.
Answer: A. It gives your brain an opportunity to remove waste products that are created when cells fire.
&
C. It gives your muscles a chance to repair themselves and/or grow.
Explanation:
I have first-hand experience for C and I am pretty sure A is common knowledge.... Right? Or is it just me?
