— I'm going to apply for Fudan University.

—_____ You've been dreaming to study in Beijing. [ ]

A. Congratulations!              

B. Good luck!

C. Why not Tsinghua?            

D. Good idea!

债务人怠于行使到期债权，而有害于债权人债权时，债权人可以请求人民法院行使 ( )。

A．撤销权

B．代位权

C．合同保全

D．不安抗辩权