a) A social movement is a sustained, organized effort to bring about social change, while collective behavior is a spontaneous, unstructured behavior of a group of people.
b) A social movement and a collective behavior are the same thing.
c) A social movement is a spontaneous, unstructured behavior of a group of people, while collective behavior is a sustained, organized effort to bring about social change.
Answer: a) A social movement is a sustained, organized effort to bring about social change, while collective behavior is a spontaneous, unstructured behavior of a group of people.