How does the ERX Edge Router interact with subscriber IP addresses assigned by an external
DHCP server?

A.
It monitors messages from the external server and updates the routing table as needed.

B.
It maintains the leases for the DHCP server and reassigns addresses to new subscribers.

C.
It sends keepalives to the subscriber and makes the address available when the subscriber
stops responding.

D.
It sends keepalives to the subscriber and removes the host route when the subscriber stops
responding.

Explanation: