Americans felt pressure to accuse others of supporting communism.
Explanation:
This is the most accurate description of a consequence of the activities of Senator Joseph McCarthy. Senator McCarthy is famous for having initiated an intense persecution of people who were believed to be Communist sympathizers. As this happened during the Cold War, many people were scared of communism, and they began to feel pressure to accuse others of supporting it. The people who were accused (whether they were actual sympathizers or not) often faced the loss of their reputation, social group and means of livelihood.
