Finding the ______look on the student’ s face, the professor felt _____about his explanation. 

A．confusing, embarrassed

B．confused, embarrassed

C．confused, embarrassing

D．confusing, embarrassing

凡由于装卸人员操作不当造成的事故，由（）作好现场记录。

A、装卸人员

B、看舱人员

C、A+B

D、值班驾驶员