Which option is a primary requirement for the deployment of an IPv6-enabled network via the native method (dual-stack model) within the enterprise campus environment?

A.	hardware-based switching support for IPv6 forwarding on all campus switches
B.	restriction of IPv6-enabled devices to the core layer
C.	manual implementation of tunneling between IPv6-incompatible devices in an IPv4-over-IPv6 tunne
D.	disabling of multicast in the distribution layer prior to implementation of IPv6