What caused nelson mandela to become an activist

Which would make the best heading for this list of notes about the migration of african-americans during the reconstruction era?

Which of these is not a criticism of the concentric zone model? it does not accurately describe cities after the rise of suburban development. it only applies to cities that grew after the development of the automobile. it assumes that inner-city areas will always be repurposed instead of abandoned. it places too much importance on the traditional central business district.

What is the meaning of the phrase “bear ’t”? what word is left out between the words but and few?