C.
Janine should increase the intensity or length of her exercise programs because it is more difficult to maintain high fitness levels as you age.
It's C because there are only hormonal, enzymatic, structural, defensive, storage, transport, receptor, and contractile proteins. So C. isn't a class of proteins which makes it the answer.
Answer:
fat provides the most energy
C. Yes, flexibility is a different and important way of working muscle.
Answer:
ok this is pretty simple
Explanation:
you have been given points to talk about in the paragraph so u can use a pael paragraph
P-point
A-analysis
E-evidence
L-link
hope this is helpful