The response that BEST expresses the message Arthur Miller intended to communicate through The Crucible during the McCarthyism era is:
b. Miller hoped to warn his readers about the damage that a climate of fear, suspicion, and accusations can inflict on a community.
This choice encapsulates Miller's critique of the destructive effects of McCarthyism, where fear and unfounded accusations led to social division and harm, mirroring the events depicted in his play.