You wash your hands before meals. It is good for your health. A. may B. can C. must

问题补充：

You wash your hands before meals. It is good for your health.

A. may B. can C. must

答案：

解析：A. may表推测，可能 B. can 能够 C. must必须，肯定推测，根据句意：你必须饭前洗手，这对你的健康又好处，be good for对……有好处；故选C.