As Compared to Young Adults, the Following Is True for Middle-Aged

As compared to young adults, the following is true for middle-aged adults:

A) For those who begin an exercise program, it takes less time to get the body back into physical shape
B) It takes a shorter period to recover from colds and other common ailments
C) Middle-aged adults are best at tasks that require endurance rather than rapid bursts of energy
D) In the early forties, a general increase in rate of metabolism usually occurs