How Do Free Spaces Affect Social Movements

How do free spaces affect social movements?

A) They encourage the formation of a group identity to mobilize and sustain participation and leadership.
B) They create obstacles that are usually based on racial divisions.
C) They foster communication between the movement's leaders and their opponents to promote negotiation.
D) They permit supporters to air their grievances in designated public arenas, allowing citizens to assess the movement's arguments.