—What did your mother say on the phone?

—She asked ______.[ ]

A. why did I fail the exam

B. why I failed the exam

C. why did you fail the exam

D. why I fail the exam

建设单位申请领取施工许可证必须有已经落实的建设资金。建设工期不足一年的，到位资金原则上不得少于工程合同价的（）。

A．20% 

B．30% 

C．40% 

D．50%