To be a great debater, it is important to do the followings except（）

To be a great debater, it is important to do the followings except（）
A.speak clearly, loudly, and with good emphasis
B.think about what the other team will say against your argument
C.learn a lot about your topic by researching it
D.be aggressive in giving counter claims.
正确答案：be aggressive in giving counter claims.