The primary issue with a one party system is the suppression of individual rights and no democratic rights.
In a one-party system, like the one in Communist China, the people have no voice in how the country is run. One political party makes all the decision without any opposition in the parliament.
From the perspective of human rights, this will lead to dictatorship and a curb on freedom of speech.
I think the answer is between b and c. But the answer that I heard of in history class would be C. The fact that immigrants took away high paying jobs from union members.
