Refer to the exhibit. Routers R1 and R2 have established a neighbor relationship and are
exchanging routing information. The network design requires that R1 receive routing updates
from R2, but not advertise any routes to R2. Which configuration command sequence will
successfully accomplish this task?

A.
R1(config)# router eigrp 1
R1(config-router)# passive-interface serial 0

B.
R1(config)# access-list 20 deny any
R1(config)# router eigrp 1
R1(config-router)# distribute-list 20 out serial 0

C.
R2(config)# access-list 20 permit any
R2(config)# router eigrp 1
R2(config-router)# distribute-list 20 in serial 0

D.
R1(config)# access-list 20 permit any
R1(config)# router eigrp 1
R1(config-router)# distribute-list 20 in serial 0

E.
R2(config)# access-list 20 deny any
R2(config)# router eigrp 1
R2(config-router)# distribute-list 20 out serial 0

F.
R2(config)# router eigrp 1
R2(config-router)# passive-interface serial 0

Explanation: