The answer is B, because the Song would make all government candidates undergo the civil service exam. Only if they passed would they be able to become part of the bureaucracy.
The correct answer would be D) local authorities' refusal to integrate Central High School. I say this because it is the only logical answer.
Ok so you could Read the question then go onto the text and find the information that answers it or is related to it hope this helps!
I think the answer is A. Roman government stops taxing its citizens.