Which of the following reasons best explains the division of the korean peninsula after wwii as shown?
a. the chinese communist government had moved their troops to the 38th parallel in korea during the war and taken control of the northern part of the country.

b. the defeat of japan led to the division with a soviet backed communist government in the north and a u. s. backed democratic government the south.

c. the south koreans had fought on behalf of the allies during wwii while the north koreans had fought on behalf of the axis powers.

d. the united nations charter of 1945 called for the division of the country into a democratic north and a communist south

A. The Chinese communist government had moved their troops to the 38th parallel in Korea during the war and taken control of the northern part of the country

The war caused a lot of pushing up and down the frontline. First the North Korean troops came to control almost the entire peninsula as it pushed down, when Seoul failed to repel the attack they continued to gain terrain. However when United Nation troops under command of Mc Arthur decided to counterattack , they approached the Yalu River , a natural border with China. To surprise of the Occidental armies, on October 1950, a huge amount of  Chinese divisions crossed the Yalu and entered the war.  With these upheavals of fortune, Seoul switched hands four times.

When the conflict ended in 1953, the armistice was held on the 38th parallel that still today represents a region of tension and militar surveillance from both sides.

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