Why didn't you make me a telephone call yesterday? I _____ about it.

A．should be told

B．ought to have been told

C．should have told

D．ought to be told

施工成本管理的措施中，( )是其他各类措施的前提和保障。

A．组织措施

B．技术措施

C．经济措施

D．合同措施