Can you make sure _____________ the gold ring?

A．where Alice had put

B．where had Alice put

C．where Alice has put

D．where has Alice put

按照施工合同示范文本的规定，对合同双方有约束力的合同文件包括( )。

A．投标书及其附件

B．招标阶段对投标人质疑的书面解答

C．资格审查文件

D．履行合同过程中的变更协议

E．工程报价单