Which of these resulted from the success of McCarthyism?

increased spending on the military

the resignation of President Truman

the blacklisting of suspected communists

decreases in immigration quotas for Eastern Europe

the blacklisting of suspected communists

Those suspected of communism were removed from their jobs and often investigated by the government.

Blacklisting prevented people from getting homes, jobs, and were investigated and watched by the government. McCarthyism created fear and people turning in neighbors and acquaintances for any odd behavior.

What resulted from the success of McCarthyism was the blacklisting of suspected communist.