
Passage: Only unwise people spoke ill of the people of Dongshan County in front of Dong Jia, and Shi Fei, a friend of Dong Jia, spoke ill of Xi Jia in front of Dong Jia. But what is puzzling is that Dong Jia's friends are very wise people.
Question: According to the above statement, which of the followings can be inferred?
A. A.Shi Fei is unwise.
B. B.Shi Fei is not from Dongshan County.
C. C.Xi Jia is a friend of Dong Jia.
D. D.Xi Jia is not from Dongshan County.
Answer: