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 i panicked?

A: “I was bowling down the bend above Island 66, brimful of confidence…”

B: “Deep four in a bottomless crossing!”

C: “I would hardly get the boat started to port before I would see new dangers on that side.”

D: “D-e-e-p four!”