For many years, there have been efforts to organize teaching assistants on college campuses and form a union. These efforts often fail because of practical reasons, such as limited numbers of volunteers, the fact that leaders graduate and leave, and organizers' limited money for supplies. What theory is MOST associated with these reasons?

A) resource mobilization
B) relative deprivation
C) mass society
D) technological diffusion

The theory of resource mobilization suggests that successful social movements require resources such as money, volunteers, and leadership. In the case of organizing teaching assistants, practical constraints such as limited numbers of volunteers and funding can impede the formation of a union. Additionally, the turnover of leaders as a result of graduation could also hinder the movement's progress. Therefore, the reasons given are most associated with the theory of resource mobilization.