Which of the following are correct about sweet potatoes？

A.It originated from South America.

B.It is one of the staple food in China.

C.One of its nicknames is “山芋” in China.

D.It first came to China in the Tang Dynasty.

正确答案：It originated from South America.#It is one of the staple food in China.#One of its nicknames is “山芋” in China.