问题
                    
That young woman has something to do with the kidnapping, doesn’t she—________, though she insisted she was at home then.
                            A:I don’t agree
B:I don’t think so
C:That’s a good idea
D:I think so;
                        
                        B:I don’t think so
C:That’s a good idea
D:I think so;
正确答案是:
                        