How did direct action in Birmingham, according to King, develop over time?

A. After undergoing mental preparation and training, activists made considerations about the timing of holiday shopping seasons as well as the mayoral election

B. Activists immediately took hasty action after learning about the bombing of negro churches.

C. Due to organizational failures, activists have yet to engage in direct action in Birmingham.

D. Activists focused on training many individuals to participate in the direct action campaign.