
Passage: "Some good things are not cheap. Therefore, not all cheap things are good things."
Question: Which of the following options is not valid for the above conclusion?
A. A.Not all people in Hunan like to eat pepper. Therefore, some people who like to eat pepper are not from Hunan
B. B.Some people are not selfish. Therefore, people are not all selfish
C. C.A good motive does not necessarily have a good effect. Therefore, good results do not necessarily come from good motivation
D. D.Some southerners are not Cantonese. Therefore, not all Cantonese are southerners
Answer: