Workarounds are determined during which risk management process?（）.

A.Risk identification

B.Quantitative risk analysis

C.Plan risk responses

D.Risk monitoring and control

钢筋代换时，应征得（）的同意，相应费用按有关合同规定并办理相应手续。

A．设计单位

B．施工单位

C．监理单位

D．建设单位