After ratification of the fifteenth amendment, how many african americans served in congress in the late 1800s?

The Chinese people began to question their faith in communism.

Explanation:

This is one of the reasons why the Cultural Revolution was not as successful as the Chinese government wanted it to be. Initially, the government had wanted to reeducate all people so that they would adopt the values and teachings of Communism. However, as more and more people witnessed that the government was not as effective as it should have been, people began to question their faith in communism, making the reeducation process less effective.