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．A solid foundation in basic mathematics and Asian culture
B．Hard work and intelligence
C．Hard help and a limited knowledge of English
D．Asian culture and the American educational system