Answer:
B. 100
HUAC (House Un-American Activities Committee) was a committee of the United States House of Representatives that investigated alleged disloyalty and subversive activities on the part of private citizens, public employees, and those organizations suspected of having Communist ties. Many Hollywood actors, writers, and directors were called before the committee to testify about their political beliefs.
During the 1940s and 1950s, many people in Hollywood were blacklisted (lost their jobs) for not answering HUAC's questions about communism. It is estimated that around 100 people in Hollywood were blacklisted for their political beliefs during this time period. This era was known as the Hollywood Blacklist. The blacklisted individuals were unable to find work in the film industry, as they were effectively banned from working in Hollywood due to their supposed communist ties.