An engineer is assigned to replace an older data-grade autonomous wireless network with a Cisco controller-based wireles

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An engineer is assigned to replace an older data-grade autonomous wireless network with a Cisco controller-based wireless network to meet Voice over WLAN needs. The customer also wants all existing cable infrastructure to be reused and no new cable be specified. How should the engineer respond to the customers requirements?

A. Implement the wireless network with the restraints and decrease the TPC neighbor threshold to increase Tx power to provide overlapping cell coverage at sufficient SNR to provide for Voice over WLAN service.
B. Implement the wireless network with the restraints and utilize high-gain antenna to provide overlapping cell coverage at sufficient SNR to provide for Voice over WLAN service.
C. Inform the customer that the network will not likely function as desired and a post install survey with the possibility of some new cable would be recommended.
D. Inform the customer that it is not possible to provide coverage and quality for Voice over WLAN using existing AP locations and an entire overbuild will be