Why were the communists able to win the Chinese Civil War?
A. Mao Zedong and his nationalists took control of the large offshore island of Taiwan but could not hold the mainland.
B. Mao Zedong and his nationalists were weak and had no support from the Chinese people.
C. Jiang Jieshi and his nationalist forces had no money, and the United States refused to intervene by sending monetary aid.
D. Jiang Jieshi and his nationalist forces were corrupt, and the United States refused to intervene militarily.