hough most people believe that their personalities change more with age than they actually do

. Though most people believe that their personalities change more with age than they actually do, personality changes in middle adulthood is possible. According to cross sectional studies on the topic, what is the most likely mechanism behind this?
A decline in achievement striving, independence, assertiveness, and individualism
An increase in prosocial behavior and positive emotionality
A decline in tenacious goal pursuit and negative emotionality
An increased ability to maintain control of one s emotions in a variety of situations