工期较短的项目采用的合同计价方式是（）。

A．固定单价合同

B．成本加酬金合同

C．固定总价合同

D．变动总价合同

The seller should guarantee that the commodities comply ______ the quality, specification and preformance as stipulated in the contract.

A．for
B．in
C．to
D．with