B makes the most sense to me so I would go with that
Answer:
Your answer is carbon dioxide.
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Cardiac muscle, skeletal muscle, smooth muscle.
Answer:
What does collagen do in the body?
Collagen is one of the most plentiful proteins in mammals. It is responsible for several biological functions, one of which is to provide structural support in connective tissue, muscle, and skin. Collagen is the protein responsible for skin elasticity. It also plays a role in joint and bone health.Jun
Explanation:
