The most common causes of wasting of the small muscles of the hands are old age and arthritis. Which of the following statements is true regarding muscle power in these conditions?

A: Muscle power is significantly reduced in the wasted muscles due to old age and arthritis.

B: Muscle power is preserved in the wasted muscles despite old age and arthritis.

C: Muscle power is only preserved in the wasted muscles if the cause is arthritis, not old age.

D: Muscle power is always lost in the wasted muscles regardless of the cause.

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