Which of the Following Statements Regarding Motor Performance and Aging

Which of the following statements regarding motor performance and aging is accurate?

A) "Average" behavior for specific age groups grows less and less accurate for an individual's performance as the age of the group increases.
B) All motor functions will decline with age.
C) Variability in the motor performance of adults increases with each decade of life.
D) All of these are correct.
E) "Average" behavior for specific age groups grows less and less accurate for an individual's performance as the age of the group increases and variability in the motor performance of adults increases with each decade of life.