President Truman on March 21, 1947 issued an executive order, initiating a comprehensive investigation of the loyalty of all federal employees. This was the beginning of ______.

President Truman on March 21, 1947 issued an executive order, initiating a comprehensive investigation of the loyalty of all federal employees. This was the beginning of ______.

A.McCarthyism

B.Clearing out Soviet spies

C.widespread persecution of Communists and progressive people

D.persecution of federal employees

正确答案是C