--- Mom, I’d like to drink some milk tea. --- Well, it’s reported that the HEDP (塑化剂) in it is bad for us. ________ you don’t care about your health, you can do it.
—Tom must be at home because the light in his house is on.
—He ____ be at home, because I saw him playing basketball on the playground.
A. must B. can’t C. mustn’t