Why was Henry "dumbfounded" at hearing himself say, "Well, don't we fight like the devil..."?

a. He is usually so introspective he doesn't say anything, he was amazed he was speaking much at all.

b. He never spoke in such a common way before.

c. He was filled with the spirit of the romantic glory of war.

d. He realized that he ran instead of fighting but included himself with those who did fight.