Which of the following passages from Edward Abbey's "The D***ation of a Canyon best demonstrates his use of ethos to help his argument?

A. The difference between the present reservoir, with its silent sterile
shores and debris-choked side canyons, and the original Glen
Canyon, is the difference between death and life. Glen Canyon
was alive. Lake Powell is a graveyard.

B. One should admit at the outset to a certain bias. Indeed I am a
"butterfly chaser, googly eyed bleeding heart and wild
conservative.

C. In the summer and fall of 1967 I worked as a seasonal park ranger
at the new Glen Canyon National Recreation Area. During my five-
month tour of duty I worked at the main marina and headquarters
area called Wahweap, at Bullfrog Basin toward the upper end of
the reservoir, and finally at Lee's Ferry downriver from
Glen Canyon Dam

D. Lake Powell, formed by Glen Canyon Dam, is not a lake. It is a
reservoir, with a constantly fluctuating water level - more like a bathtub that is never drained than a true lake.