问题

________ by the problem that was put forward at the meeting,the people in the audiencehad ________ looks on their faces[ ]
A:Puzzled;puzzling
B:Puzzled;puzzled
C:Puzzling;puzzling
D:Puzzling;puzzled
B:Puzzled;puzzled
C:Puzzling;puzzling
D:Puzzling;puzzled
正确答案是: