The decomposition process is a technique used to construct a ______ .

A．work breakdown structure (WB
B．resource breakdown structure (RB
C．project scope statement
D．schedule delays control plan

A．a variation in government regulations
B．failure to include a required feature in the design of a telecommunication system
C．discovering a need to engage in bottom-up cost estimating
D．introducing technology that was not available when scope was originally defined