Which option describes a difference between EIGRP for IPv4 and IPv6?

Which option describes a difference between EIGRP for IPv4 and IPv6?
A . Only EIGRP for IPv6 advertises all connected networks.
B . Only EIGRP for IPv6 requires a router ID to be configured under the routing process-
C . AS numbers are configured in EIGRP but not in EIGRPv3.
D . Only EIGRP for IPv6 is enabled in the global configuration mode.

Answer: B

Explanation:

Router ID – Both EIGRP for IPv4 and EIGRP for IPv6 use a 32-bit number for the EIGRP router ID. The 32-bit router ID is represented in dotted-decimal notation and is commonly referred to as an IPv4 address. If the EIGRP for IPv6 router has not been configured with an IPv4 address, the eigrp router-id command must be used to configure a 32-bit router ID. The process for determining the router ID is the same for both EIGRP for IPv4 and IPv6.