In the Cisco Expressway solution, which two features does Mobile and Remote Access provide? (Choose two.)

In the Cisco Expressway solution, which two features does Mobile and Remote Access provide? (Choose two.)
A . VPN-based enterprise access for a subnet of Cisco Unified IP Phone models
B . secure reverse proxy firewall traversal connectivity
C . the ability of Cisco IP Phones to access the enterprise through VPN connection
D . the ability to register third-party SIP or H.323 devices on Cisco UCM without requiring VPN
E . the ability for remote users and their devices to access and consume enterprise collaboration applications and services

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Answer: BE