Final answer:
Eccentric contractions provide the greatest increase in muscle strength as they involve controlled lengthening of the muscle under tension.
Step-by-step explanation:
The type of movement that provides the greatest increase in muscle strength is c) Eccentric contractions. This is when the muscle lengthens while maintaining tension. During an eccentric contraction, such as when a hand weight is lowered, the amount of cross-bridges being activated decreases, and the muscle tension diminishes even as the muscle is doing work. This controlled lengthening of the muscle during load bearing has been shown to produce significant gains in muscle strength.