Read this excerpt from "A Cub Pilot" from Mark Twain's memoir, Life on the Mississippi. I began to climb the wheel like a squirrel, but I would hardly get the boat started to port before I would see new dangers on that side, and away I would spin to the other, only to find perils accumulating to starboard and be crazy to get to port again. Then came the leadsman's sepulchral cry:

"D-e-e-p four!"

Deep four in a bottomless crossing! The terror of it took my breath away.
Which line from the excerpt best supports the idea that Twain is afraid?

A. "...away I would spin to the other..."

B. "The terror of it took my breath away."

C. "Deep four in a bottomless crossing!"

D. "I began to climb the wheel like a squirrel..."