In 1882, congress passed an "exclusion act" which prevented the immigration of workers from what country for 10 years?

The resulting Angell Treaty permitted the United States to restrict, but not completely prohibit, Chinese immigration. In 1882, Congress passed the Chinese Exclusion Act, which, per the terms of the Angell Treaty, suspended the immigration of Chinese laborers skilled or unskilled for a period of 10 years.

It prevented Chinese workers 

C

Explanation:

Ethos, because she is establishing her own credibility to her audience.