Help asap for 9th grade english sem.2 help meh pl

Which excerpt from is an example of an ad hominem fallacy?

A. It is often stated that the dam and its reservoir have opened up to the many what was formally restricted to the few . . .

B. Lake Powell, though not a lake, may well be as its defenders assert the most beautiful reservoir in the world.

C. Defenders of the dam argue that the recreational benefits available . . . outweigh the loss of Indian ruins . . .

D. This argument appeals to the wheelchair ethos of the wealthy, upper-middle-class American slob.