The author's tone in this passage is （）

A. They are afraid that they would again be isolated from American society in general
B. People would think that Asian students rely on their parents for success
C. Asian Americans would be a threat to other minorities
D. American academic achievements have taken on too strong an Asian character

A．feel they are mistreated because of limited knowledge of English
B．are afraid that their academic successes bear a strong Asian character
C．still worry about unfair treatment in society
D．generally feel it a shame to have to depend on their parents