The all-or-none response means that

A) all of the muscles in a region contract together.

B) when a muscle fiber contracts, it contracts completely

C) all of the muscle fibers within a muscle contract together.

D) when a muscle fiber contracts, all of its ATP is converted to ADP

E) none of the above

option B) is correct

Explanation:

The all or none response means that if a muscle contracts, it will contract completely. Thus implying the all or none law which states:

The potential of a response of a muscle fiber or nerve cell is independent of the potential of the stimulus. If a stimulus is more than a certain critical value it will trigger muscle fiber or a nerve. Most importantly resulting in either an all-or-none response thus reducing possibility of any information loss.