In this task, you will be presented with a question having multiple possible answers in Chinese language. And you should choose a most suitable option out of "A", "B", "C", "D", and "E" based on your commonsense knowledge.
Q: Question: 当你在门垫上擦脚，走进门的时候，你从哪里进入？ 
 Options: A 椅 B 起居室 C 学校 D 门口 E 盥洗室 
A: 
B