Answer:
c that Soviet spies had infiltrated the American government.
Explanation:
Igor Gouzenko was formerly a citizen Soviet Union who was widely known as a spy on Canadian soil. However, he later revealed his mission publicly, and eventually defected to become a Canadian citizen.
During the investigation, the documents recovered from Igor Gouzenko revealed that "that Soviet spy had infiltrated the American government."
This is evident in the fact that following the Igor Gouzenko issue, United States later uncovered about 20 people spies passing information to the Soviet Union under the leadership of Fred Rose.
Similarly was the FBI tracked down of a Soviet spy named Ignacy Witczak, in Los Angeles.