Answer:
B). But it's not a pretty sight.
Step-by-step explanation:
Euphemism is characterized as the use of an indirect and unoffensive word or phrase in order to replace another. The words used are considered less offensive, blunt, or vulgar than the word which it replaces. In the given excerpt, the phrase 'but it's not a pretty sight' exemplifies euphemism where the Captain uses the less unpleasant or embarrassing words('not pretty) to denote the situation that he actually saw(instead of horrible). Thus, option B is the correct answer.