Which statement explains how the red scare of the 1920s and the red scare of the 1950s were similar?

a) during both periods, congress passed laws restricting the civil liberties of american citizens that met with overall public support.

b) during both periods, immigration restrictions were tightened because of fears of foreign influence.

c) during both periods, the communist party grew significantly in size despite the government's anti-communist efforts.

d) during both periods, there were numerous government employees involved in selling national security secrets to the soviet union.