a) He claimed that 205 communists worked in the US State Department.
Explanation:
McCarthy got attention for accusing people of being communists in the army or the administration without good evidence. This started in 1950 in Wheeling,West Virginia when he made a speech called enemies from within
He claimed that 205 communists worked in the US State Department, is the right answer.
Joseph Raymond McCarthy was a bureaucrat from America who served the post of the Republican Senator of the U.S. in the state of Wisconsin. He became one of the most popular personalities in the United States during the Cold War era due to the fact that he fueled the concerns of widespread Communist subversion. He gained the attention of the public for the first time when he declared that he had a list of 205 communists who were working in the state department.
