Final answer:
Router Solicitation and Router Advertisement
Step-by-step explanation:
The correct answer is C) Router Solicitation and Router Advertisement. NDP, or Neighbor Discovery Protocol, is a network-layer protocol used in IPv6 to find routers on a network.
It uses Router Solicitation messages sent by host devices to request router information, and Router Advertisement messages sent by routers to announce their presence on the network. These features allow hosts to dynamically discover and configure their network settings.