Refer to the exhibit.

EIGRP is configured on all routers in the network. On the basis of the output provided, which
statement is true?

A.
Because the key chain names do not match, router R1 will not be able to ping routers R2
and R3 .

B.
Because the key strings do not match, router R1 will not be able to ping routers R2 and
R3.

C.
Because authentication is misconfigured on interfaces Gi0/0 and Gi0/1 on router R2,
router R1 will not be able to ping routers R2 and R3.

D.
Because autosummarization needs to be turned on for EIGRP on all routers, router R1
will not be able to ping routers R2 and R3.

E.
Router R1 will be able to ping routers R2 and R3.

Explanation:
Here we see that all of the routers have correctly included the proper networks in the EIGRP
process, and the authentication is also correct so all networks would be reachable from R1.
Even though the name of the authentication keys are different, the actual keys are identical
so authentication will work.