The country life he was accustomed to________ greatly since 1992. [ ]

A. has changed                                                      

B. change          

C. changing                                                    

D. have changed

根据《担保法》的规定，债权人要求保证人对其在破产程序中未受清偿部分承担保证责任的，应当在破产程序终结后()内提出。

A．1个月

B．3个月

C．6个月

D．12个月