Which of the following activities is

powered by ATP?

A. muscle contractions

B. active transport

C. Both a and b are correct.

The answer is C. muscle contraction and active transport both use ATP (adenosine triphosphate) for their processes.

I think the answer B is correct ...

Explanation:

Active Transport and ATP. There are four different types of proteins found in cell membranes that can transport molecules across the membrane known as P-class pumps.