In schedule development, you create a distribution of probable results for each activity and use it to calculate distribution of probable results for the total project. The technique that you are using is （）.

A．what-if analysis

B．mathematical analysis

C．Monte carlo analysis

D．resource leveling heuristic

纳税人按照规定的期限办理纳税申报确有困难，需要延期的，应在规定的期限内向税务机关提出书面延期申请，经税务机关核准()。

A．可以不再申报

B．仍应申报

C．可以延期申报

D．可以分期申报