【单选题】

Man: Uh ... Uh, looks like I am going to be a little late for class. I hope Professor Clark doesn't start on time today.Woman: Are you kidding You can set your watch by the time he starts his class.Question: What can be inferred about Professor Clark
A．He wants his students to be on time for class.

B．He doesn't allow his students to tell jokes in class.
C．He is always punctual for his class.
D．He rarely notices which students are late.