Which of the following statements are correct about Chinese contribution to Geographical thought?

A. Chinese scholars first developed a scientific method of cartography based on a rectangular co-ordinate system.

B. They were the first who put forward the idea of the periodic nature of the monsoons.

C. They recognized that Africa was a southward pointing triangle whereas on contemporary maps it was always represented as pointing eastwards.

D. They opined that "geography is not concerned with the individual plants but rather with the plant and animal cover".

Choose the most appropriate answer from the options given below: