Question

select the correct answer.
why was mao zedongs communist china ready to use military tactics against the troops of us general douglas macarthur in korea?
a. mao zedong had long planned to declare war against the united states.
b. us troops kept marching farther into north korea, getting closer to the chinese border.
c. us president harry truman threatened to use nuclear weapons against china.
d. kim il sung had requested chinas help to declare war against the united states.

Explanation:

China's intervention in the Korean War was driven by concerns for its national security. As US-led UN forces advanced deep into North Korea, approaching the Chinese border (Yalu River), the Chinese government viewed this as a direct threat to its territorial safety and sovereignty. Option A is incorrect because there was no pre-existing long-term plan to declare war on the US. Option C is incorrect; while Truman considered nuclear weapons, this was not the immediate trigger for China's readiness to use military tactics. Option D is incorrect; while Kim Il Sung requested aid, the core reason for China's military response was the direct border threat from US troops.

Answer:

B. US troops kept marching farther into North Korea, getting closer to the Chinese border.