Which line in this excerpt from “the gun" is an example of euphemism?

the captain peered into the eyepiece of the telescope. he adjusted the focus quickly. "it was an atomic fission we saw, all right," he said presently. he sighed and pushed the eyepiece away. "any of you who wants to look may do so. but it's not a pretty sight." "let me look," tance the archeologist said. he bent down to look, squinting. "good lord! " he leaped violently back, knocking against dorle, the chief navigator. "why did we come all this way, then? " dorle asked, looking around at the other men. "there's no point even in landing. let's go back at once." "perhaps he's right," the biologist murmured. "but i'd like to look for myself, if i may." he pushed past tance and peered into the sight.

answer options:
he adjusted the focus quickly
but it's not pretty sight
he leaped violently back
but i'd like to look for myself, if i may