How Do Researchers Who Study Social Movements Explain Why Some

How do researchers who study social movements explain why some social movements are linked to one another?

A) They point to the power of political action.
B) They attribute the link to the money raised by social movement organizations.
C) They note that leaders and participants shift from one movement to another or share social networks, and also the fact that political conditions encourage many movements to form at the same time.
D) They attribute the link to biographical availability.