What was the origin of the territorial dispute over taiwan?

I Did a test and from what I remember it was that Chinese nationalists fled to Taiwan when the People's Republic of China was established.

D. Chinese nationalists fled to Taiwan when the People's Republic of China was established

Explanation:

The territorial disputes often related to the possession of the natural, resources like the rover fertile lands and the oils and the disputes are, mostly driven firm the nationalism and the ethnic disputes related to the languages and these s up in the original boundary. The borders that existing for the r9vla states like the republic of china and the people's republic of china as along with the Taiwan and other island nations the ROC took control over the also claimed sovereignty over the Mongols and established government in the PRC in 1949.