Helppppppp!!! I don’t understand

Answer:
The Fourth Option
Explanation:
China fell into a Civil war between the nationalist forces and the Chinese forces that wanted to take up a communist government after seeing Russia's communist government working so well for Russia. The Chinese wanted a government based around Karl Marx's idea of communism. These forces would fight for a long time until the Japanese invaded China and both the Nationalist and Communist forces would work together and fight the Japanese.