Which lines in this excerpt from Stephen Crane’s “An Episode of War” show that, after seeing the horrors of war, the lieutenant does not attach much importance to his injury?

(AThe lieutenant had been very meek, but now his face flushed, and he
looked into the doctor's eyes. "I guess I won't have it amputated," he said)

(B"Nonsense, man! Nonsense! Nonsense!" cried the doctor. "Come along, now.
I won't amputate it. Come along. Don't be a baby.)

(C"Let go of me," said the lieutenant, holding back wrathfully, his glance
fixed upon the door of the old school-house, as sinister to him as the
portals of death.)

(D"Oh, well," he said, standing shamefaced amid these tears,
"I don't suppose it matters so much as all that.")

The lines in this excerpt from Stephen Crane’s “An Episode of War” that show that, after seeing the horrors of war, the lieutenant does not attach much importance to his injury are "Oh, well," he said, standing shamefaced amid these tears, "I don't suppose it matters so much as all that."

Explanation:

The first sentence "Oh, well," he said, standing shamefaced amid these tears," shows that he is giving little importance to the injury he has got in the battle, and then in the second sentence "I don't suppose it matters so much as all that.", he is saying that his wounds are not as important as all the pain and suffering that war has brought.