Which excerpt from "To Build a Fire" is revealed to be deeply ironic by the way the story ends?

A.

"He pulled the mitten on hurriedly and stood up. He was a bit frightened. He stamped up and down until the stinging returned to his feet. It certainly was cold, he thought."

B.

"Well, here he was; he had had the accident; he was alone; and he had saved himself. Those old-timers were rather womanish, he thought."

C.

"The blood was alive, like the dog, and like the dog it wanted to hide itself away and cover itself up from the fearful cold."

D.

"But the man whistled, and spoke to [the dog] with the sound of whip lashes, and the dog swung in at the man's heels and followed after."