Which of following best describes customer benefits in delivering network readiness assessment services in plan phase？（）
A. improve its ability to achieve business goals by identifying and aligning advanced technologies with business requirements
B. improve its return on investment and speed migration by improve its ability to identify，understand， and plan for necessary changes in infrastructure or resource
C. ensure that key employees understand all of the implementation steps
D. reduce the amount of risk it is exposed to by using proven project management methodologies and risk mitigation strategie
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