Muscles can be distinguished based on structure and function, like- skeletal, cardiac and smooth. Each one has distinct roles and attributes.
Voluntary muscles may be attached to the skeleton, use ATP to energize contration and could be striated in appearance. Therefore, statements B, C & D are correct attributes for skeletal muscles. However, they are not the reasons why skeletal muscles are called voluntary muscles.
Skeletal muscles are called voluntary muscles because they are under conscious control (A). They are composed of parallel bundles of striated and multinucleate fibers. It is by virtue of these muscles that man can “stalk and walk”.
Therefore, option (A) is correct.