Which country entered the side of North Korea and changed the course of the war? a.) china
b) soviet union
C.) Japan

A, China

Explanation:

China, which borders the north edge of North Korea, entered the war and the US viewed this as too high of a risk to escalate the war any further. This started the negotiations for the 38th parallel/DMZ, which is the reason Korea is now 2 Koreas: the free market/representative government that is South Korea and the communist/non-representative government that is North Korea.

d is the best answer for this question.

answer; i believe the correct answer is (desert storm);