The correct answer is C) the arrest of Julius and Ethel Rosenberg for espionage.
Senator McCarthy's influence might have died quickly following his 1950 accusations had it not been for the arrest of Julius and Ethel Rosenberg for espionage.
Wisconsin Senator Joseph McCarthy accused many people of being Communist in the United States during the Second Red Scare. Most of his accusations did not provide any support. He made a lot of damage to the reputation of many people. His accusations were mostly about subversion or treason, but he never showed any evidence. But Senator McCarthy's influence might have died quickly following his 1950 accusations had it not been for the arrest of Julius and Ethel Rosenberg for espionage.