Answer:
The answer is (B) Charging that people were not loyal to the United States without proof.
Explanation:
McCarthyism was a campaign during the 1940s - 1950s in which countless people were accused of being communists (therefore betraying the U.S. because Russia was an enemy of the U.S. and a communist country) with little to no proof. It was called McCarthyism because it was carried out by Senator Joseph McCarthy.
Answer:
B. Charging that people were not loyal to the united states without proof