The correct answer to this open question is the following.
The issues that encouraged membership in the Communist Party were poverty and racial discrimination, two of the most critical problems that affected the United States at the time.
When the Socialist Party of America ended in 1919, Communist people in the United States created the Communist Party on May 1, 1919, and permanently collaborated with the American Farmers organizations and many labor unions in the country. The platform of the Communist Party supported the end of racism in the United States and favored policies that helped the poor.
The answer is b and it is shown by What they said
