Clean Microscope<br>Viktor could not get his microscope to focus. His professor came to help. His professor also could not get it to focus. The professor wiped the lens with a solvent. He was then able to focus the lens.
The professor only made the problem worse.
It's definitely incorrect because the professor fixed the problem by using the solvent. It's difficult because I phrased the question in a way that doesn't use many words from the text, so the system probably thought the statement could not be verified.