Mr. Smith works in a machine factory. There he drives a truck. He’s busy all the time and can’t do any housework. His wife is a doctor and likes to keep all the things tidy and clean. She usually goes to work from Monday to Friday and has to do all the housework on Saturdays. All her friends know about it and sometimes they come to help her. Last Saturday Mr. Smith had something to do and he left a lot of dirty clothes at home. Mrs. Smith didn’t go to work, because she was a little ill. So she didn’t want to do anything. After breakfast, Mary, one of her friends, came to see her when she was sitting on a chair. The girl found the rooms were dirty and asked, "Don’t you clean your room today, Mrs. Smith" "No, I don’t," said the doctor. "Why don’t you wear glasses" "This way I’ll think the rooms are tidy and clean!\ Mrs. Smith didn’t wear her glasses because ______.
A. she stayed at home B. she didn’t want to see the dirty room C. she finished cleaning the room