Answer: e. included liberals and unionists in its definition of "un-American."
Explanation: In 1938, Congress established the House Un-American Activities Committee to investigate people with communist ties or agenda. Its goal was to prevent the spread of communism in the United States but it soon developed other political goals and was used against liberal as well as unionists. It was believed that communists hid in plain sight in Hollywood and targeted people who spoke against the committee in Hollywood. The committee also argued that communists disguised themselves as liberals and unionists.