Muscular strength is the
(a) ability to sustain a given level of muscular tension over time.
(b) ability to move the joints through a full range of motion.
(c) amount of force a muscle can produce repeatedly over 60 seconds.
(d) amount of force a muscle can produce with a single maximum effort.

C. amount of force a muscle can produce with a single maximum effort.

Explanation:

Muscular strength can be define as the amount of force that a muscle can produce with single maximum effort. The muscle strength depends upon the size of the muscle fibers, ability of the nerves to activate the nerve fibers. It can be measured during the process of muscular contraction. The muscle strength helps in alignment of the body, increases the metabolism of the body, and helps in daily physical actions.    

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