Which two statements about Cisco Webex Video Mesh Nodes are true? (Choose two.)

Which two statements about Cisco Webex Video Mesh Nodes are true? (Choose two.)
A . When Expressway Core works with VMN clusters, Expressway Core decides which VMN is used for signaling/media connection.
B . Cloud-registered devices choose a VMN cluster based on the lowest STUN round trip delay.
C . The cascading traffic between VMN must bypass the firewall.
D . When Cisco Unified Communications Manager works with multiple VMNs, Cisco Unified CM decides which VMN is used for signaling connection.
E . A VMN can terminate a media connection while operating in maintenance mode.

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Answer: BD