In this passage the author expresses a tone of ______.

A．He is barely qualified to teach in Harvard.
B．He is an American of African descent.
C．History and education are his minors.
D．President Gore is among his friends.

A．comA. It may be financially mediocre to Time Warner.B. It is maintained by Gates for Time Warner.C. It becomes a sister website of America Online.D. It is meant for the U. S. general publi