Refer to the exhibit. All of these network devices are running IPv6. When host A is attached to this link, how will it discover the presence of routers B and C? 

Answer options:

A. Routers B and C will respond to an ICMP get route request sent by host A.B. Routers B and C will detect the addition of the new host the first time it transmits any packets, and will send an ICMP router discovery reply to host A.C. Host A will discover routers B and C through the neighbor discovery process.
D. Routers B and C send out periodic gratuitous ARPv6 messages to alert newly attached hosts to their presence.

C