题目内容：
Which of the following is Not the characteristic of grade-two thinkers?
A.Grade-two thinkers think of grade-one thinking as contradictory.
B.Grade-two thinkers tend to withdraw from the crowd and do not follow others blindly.
C.Grade-two thinkers are contemptuous of patriotism.
D.Grade-two thinkers can find out what is wrong with grade-one thinking but do not create anything to replace it.
参考答案：