问题

There was a________look on his face when he met with the________problem. [ ]
A: confusing; confusing
B: conIMG style="WIDTH: 1px; HEIGHT: 1px; VERTI
C: confusing; confused
D: confused; confusing
B: conIMG style="WIDTH: 1px; HEIGHT: 1px; VERTI
C: confusing; confused
D: confused; confusing
正确答案是: