Correct answer is A. turned over documents proving that Soviets were trying to infiltrate the U.S. government.
Explanation:
Option A is correct because this event created a massive retaliation in the United States, where many people were marked as Communists, sometimes even without evidences.
Venona project was started during WW2 with a goal to decrypt messages that were sent by Soviet intelligence agencies.
McCarran Act was introduced in 1950, with a goal to act against Communism in US.
D is also not correct as many in Hollywood were marked as Communist and there were testimonies against them even on courts.
Wehrmacht. ( lit. defence force) was the unified armed forces of Nazi Germany from 1935 to 1945. It consisted of the Heer (army), the Kriegsmarine (navy) and the Luftwaffe (air force).
