Arouter receives an ethernet frame that holds an ipv6 packet. the router then makes a decision to route the packet out a serial link. which of the following statements is true about how a router forwards an ipv6 packet?

a. the router discards the ethernet data link header and trailer of the received frame.

b. the router makes the forwarding decision based on the packet's source ipv6 address.

c. the router keeps the ethernet header, encapsulating the entire frame inside a new ipv6 packet before sending it over the serial link.

d. the router uses the ipv4 routing table when choosing where to forward the packet.