I believe the answer is A, but am not 100% sure.
Answer:
The Boxer Rebellion positively affected US-Asian relations because of the US's suppression of the rebellion which resulted in the end of dynasties and the initiation of the Open Door Policy in China. ... Using this sponsoring, they killed and destroyed within China until the Empress declared war on the foreign powers.
Explanation:
The Mongols were a nomadic tribe to the north of China. They shared the mountainous areas between China and Siberia with many other such tribes, many of them Turkic.
I believe they were called unionists as they were part of the Union. The south was the Confederacy therefore southerners were Confederates.
