Why do people join social movements according to relative deprivation theory?

a. social movements are good places to meet people and network.
b. social movements are a necessary part of a system of social stratification.
c. joining a social movement is a rational response to inequality or oppression.
d. they are filling a psychological need to belong to something.

Explanation:

Relative deprivation is the lack of resources to sustain lifestyle, diet and activities. It is used by the social scientists to measure the social, political and economic deprivation.  

Sociologists and political scientists consider the relative deprivation to be reason for social movements which leads to civil wars and terrorism. Scholars explain that  social movements arise when people feel deprived. Similarly individuals engaged in such activities when their behaviour do no match their goals.

where are the choices

mammals. mammals of the piedmont region live in several habitats such as wetlands, fields and forests. raccoons live across the state including the piedmont. they've adapted to environmental changes, including the loss of natural habitat.