(sociology) which concept is part of disengagement theory? a. disengagement is essential to the stability of a society. b. disengagement is more common in agrarian societies than in industrialized societies. c. disengagement will result in a lowering of the society's median age. d. disengagement affects those with an ascribed status more than those with an achieved status.

The correct option is A.
Disengagement theory refers to the manner in which older adults make necessary adjustments to aging by detaching themselves from their social roles in order to prepare for their eventual death. The act of disengagement helps the orderly and gradual transfer of statuses and roles from one generation to the other thus ensuring stability and preventing abrupt chaos.