连编应用程序不能生成的文件是【 】。

A．.app文件

B．.exe文件

C．.dll文件

D．.prg文件

While completing a project a project manager realizes be needs to decrease project costs. After researching his options, he comes up with the following choices. Which choice would DECREASE project costs ？（）

A．Change to component A from component Component A costs more to purchase but has a lower life cycle cost than

B．Change task A to be completed by resource B instead of Resource C, Resource B is a more experienced worke

C．Move tasks B and H to occur concurrently, and take the risk of a 30% increase in the need for five more resources late

D．Remove a test from the project pla