It affected trade because the geography
The answer is D. I hope this helped :)
Answer:
If someone refused to answer questions asked by the House Un-American Activities Committee, he could be accused of being a communist.
Explanation:
The House Un-American Activities Committee was active between 1934 and 1975. This committee, whose activities accelerated especially in the 1950s, investigated many American artists and intellectuals. In 1969, the name of the Committee was changed to "House Committee on Internal Security", and in 1975 it was ceased.
Many prominent artists such as Albert Einstein, Hanns Eisler, Orson Welles and Jules Dassin were investigated, suspected on being communists, or even worse, Soviet spies.
