External EIGRP route exchange on routers R1 and R2 was failing because the routers had duplicate
router IDs. You changed the eigrp router-id command on R1, but the problem persists. Which
additional action must you take to enable the routers to exchange routes?

A.
Change the corresponding loopback address.

B.
Change the router ID on R2.

C.
Reset the EIGRP neighbor relationship.

D.
Clear the EIGRP process.