A.Design
B.Prepare
C.Maintain
D.Optimize

A.It performs a detailed financial analysis， including current phone network costs， training， and return of investment.
B.It researches unique challenges and conducts competitive analysis to determine a vertical approach and strategy.
C.It identifies the key players， high-level solution requirements， timelines， and scope of the opportunity.
D.It provides the partner with information regarding customer acceptance of the new solution.