Answer: C) Swift uses a false premise to create humor.
Step-by-step explanation: In the given excerpt from "Gulliver's Travels" by Jonathan Swift, we can see a story about a blind man who worked (along other blind men) mixing colors for painters, they were able to do that by distinguishing each painting by its feel and smell. This passage is a clear example of the use of a false premise, or also an irony, to create humor (because the last job one can expect a blind man to have, is mixing colors) so the correct answer is option C.