According to the Activity Theory of Aging

According to the activity theory of aging:

A) as people move from middle adulthood to older adulthood they should greatly increase their level of activity.
B) older adults should gradually disengage from their social, vocational, and relationship roles and decrease their overall level of activity.
C) older adults should postpone retirement for as long as possible in order to maintain their physical health.
D) older adults will achieve the highest level of life satisfaction if they maintain their previous level of activity.