Four years ago,89-year-old Hyrum began experiencing a falloff in cognitive performance.This is a sign of
A) a loss of vitality and impending death.
B) preservation of cognitive resources.
C) disuse of particular skills rather than biological aging.
D) the irreversibility of age-related declines.

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The Answer of Four years ago,89-year-old Hyrum began experiencing a falloff in cognitive performance.This is a sign of
A) a loss of vitality and impending death.
B) preservation of cognitive resources.
C) disuse of particular skills rather than biological aging.
D) the irreversibility of age-related declines.

Four Years Ago,89-Year-Old Hyrum Began Experiencing a Falloff in Cognitive