阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。
“Confidence” is probably one of the most noticeable traits（品质）in the Americans．They show confidence in the way they talk，the way they smile，the way they dress and the way they walk．Living and competing with all these confidence American students，I find it extremely important to be confident as an international student and instructor．As a student，being confident means you should never hesitate to raise your hand whenever a question or a point comes to your mind．Don’t mind if it sounds simple or silly．Otherwise you will never get a chance to speak in class at all．What’s worse，the professors may think you are not prepared for the discussion or you do not have your own opinion on the issue—this is the last comment any graduate would like to receive．
