Which two best practices should be considered when a customer wants to purchase and implement Voice over Wireless for Cisco 7925 IP Phones? (Choose two.)

Which two best practices should be considered when a customer wants to purchase and implement Voice over Wireless for Cisco 7925 IP Phones? (Choose two.)
A . Enable lower data rates for 2.4-GHz data WLAN and higher data rates for phones.
B . Use a separate Cisco Wireless Lan Controller.
C . Enable 802.1x and Cisco Centralized Key Management for phone authentication.
D . Use dedicated Access Points only for Voice over Wireless.
E . Set data for 2.4 GHz and voice for 5 GHz using separate SSIDs.

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Answer: CE