The United States Did Not Believe China Would Intervene in the Korean

Multiple Choice

The United States did not believe China would intervene in the Korean War,because:

A) the Chinese government had been an ally of the United States.
B) China had no apparent strategic interest in protecting North Korea.
C) China obviously lacked the capability to effectively launch an attack against U.S.troops.
D) the Chinese government did not pay any real cost to making the threat.
E) U.S.troops were acting under the authority of the United Nations.