Which of the Following Was Not Among the Features of the Increasing

Which of the following was not among the features of the increasing domestic anticommunist uproar in the late 1940s and early 1950s?

A) The Federal Bureau of Investigation successfully prevented the Soviets from stealing American atomic secrets.
B) Two American citizens, Julius and Ethel Rosenberg, were executed as Soviet spies.
C) The House Un-American Activities Committee successfully exposed the State Department's Alger Hiss as a Communist agent.
D) Radical and liberal voices in unions, universities, churches, and civic institutions were muzzled.
E) Teachers and other employees in many states were forced to sign loyalty oaths.