Please help ASAP

(75pt)

Who was Zheng He?

A.
An admiral and explorer who spent 28 years exploring and trading

B.
A general who helped Zhu Yuanzhang defeat the Mongolian rulers to the north

C.
A Confucian scholar who brought back the Chinese civil service system during the Ming dynasty

D.
A Yuan emperor who moved the capital of China to Dadu and renamed it Beijing