Which describes step three of a muscle contraction?

a: the sarcomere lengthens.
b: the space between sarcomeres increases.
c: actin and myosin are partially overlapped.
d: actin and myosin are completely overlapped.

Explanation:

the answer is D i just took the test

D: Actin and myosin are completely overlapped

Explanation:

During the process of muscle contraction, actin slides over the myosin filaments toward the sarcomere. Contraction begins in the band A of the muscles, where actin and myosin overlap.

During this process, band I decreases in size as actin penetrates band A, and at the same time band H (composed only of thick myosin filaments) also shrinks as actin and myosin overlap, and when they are completely overlapping, band H is no longer visible.

This represents a major shortening of the sarcomere and therefore muscle contraction.

2%? i tried finding the exact sorry if it's not 100% correct ; -;