问题：
[单选题]Generally in western classrooms, whenever the professor asks students a question, ( ).
Ait's always a rhetorical question
Bhe'll expect them to answer
Cit's just a custom
[单选题]Generally in western classrooms, whenever the professor asks students a question, ( ).
Ait's always a rhetorical question
Bhe'll expect them to answer
Cit's just a custom
