Studies of Voluntary Participation That Controlled for Social Class Found

Studies of voluntary participation that controlled for social class found

A) voluntary participation increases in all social classes.
B) voluntary participation declines with age.
C) working class elders are more likely than middle-class or upper-class to participate in voluntary organizations, regardless of age.
D) being a "joiner" is related to middle- or upper-class lifestyle, and aging does not necessarily change this lifestyle.