Which describes what could done on the Expressway-E to successfully route calls from Expressway-C on the internal network to the Internet?

Which describes what could done on the Expressway-E to successfully route calls from Expressway-C on the internal network to the Internet?
A . Application layer gateway could be enabled to bridge the media traffic.
B . A static NAT route could be added to the firewall to bridge the two networks.
C . The Expressway-E could be enabled for Dual-NIC capability.
D . The Expressway-E could be enabled for interworking.

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Answer: C