Involvement in a Social Movement Typically Increases People's Commitment to the Movement

Involvement in a social movement typically increases people's commitment to the movement. Social psychologists argue that this happens because:

A) behavior shapes attitudes
B) movement participants often acquire new ideologies that lead them to minimize their other role commitments (e.g., pertaining to family and work)
C) movement participation causes people outside of the movement to view an individual more positively, which results in a self-fulfilling prophecy
D) once people start participating in a social movement, they realize how important the movement is to society
E) participants in a social movement directly see the positive consequences of their behavior on the structure of society