Which three recommendations must be taken into consideration when an engineer is installing a new Voice WLAN? (Choose three.)

Which three recommendations must be taken into consideration when an engineer is installing a new Voice WLAN? (Choose three.)
A . Use the Cisco wireless phone site survey client utility.
B . Use a separate Cisco Wireless Lan Controller.
C . Enable load balance on voice WLANs.
D . Maintain -67dBM as a minimal RSS
F . Set data for 2.4 GHz and voice for 5 GHz using separate SSIDs.
G . Enable lower data rates for 2.4-GHz data WLA

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Answer: ADE