During the implement phase, systems acceptance testing does which of the following for the customer?Select exactly 1 ans

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During the implement phase, systems acceptance testing does which of the following for the customer?Select exactly 1 answer(s) from the following:

A. installation, configuration, and testing, as well as the commissioning of tools and processes in accordance with the operations implementation plan
B. provision of information regarding customer-specified design requirements and configuration
C. the migration of network services from an existing state to a future state in accordance with the migration plan
D. the provision of an objective means of measuring system operability and functionality