Which statement describes the graceful restart capability in Cisco NX-OS Software?

A.
In NX-OS Software, the OSPFv2 graceful restart extension is Cisco proprietary and is only
compatible with other Cisco routers.

B.
A graceful restart allows OSPFv2 to remain in the data forwarding path through a process
restart. When OSPFv2 needs to restart, it first sends a type 8 LSA, which includes a grace period
that tells NSF helpers to keep all LSAs that originated from the restarting interface.

C.
Graceful restart helps keep an NX-OS system forwarding traffic transparently even if it
experiences a cold reboot.

D.
If the restarting OSPFv2 interface does not come back up before the end of the grace period, or
if the network experiences a topology change, the OSPFv2 neighbors tear down adjacency with
the restarting OSPFv2 interface and treat it as a normal OSPFv2 restart.

E.
OSPFv3 graceful restart must be disabled before doing an ISSU.