According to Congressman Richard Nixon, the Alger Hiss Case Was

According to Congressman Richard Nixon, the Alger Hiss case was significant because, for the first time, it showed the American public that .

A) domestic communism was a threat to the security of the nation
B) atomic secrets had been passed on to the Soviets
C) a person could be imprisoned for committing perjury
D) someone convicted of spying was executed