Read the excerpt, and then answer the question. "then they discussed optics, as they called it, and whether a certain injury to the brain would produce blindness or not, but they could not agree about it, and said they must test it by experiment by-and-by…" "a dog's tale." mark twain, 1904. based on the context, what is the meaning of optics? a. creating impairments b. conducting research c. science dealing with light and vision d. science dealing with the brain