Refer to the exhibit. Routers R2, R3, R4, and R5 have OSPF enabled. What should be
configured on the routers in area 1 to ensure that all default summary routes and
redistributed EIGRP routes will be forwarded from R6 to area 1, and only a default route for
all other OSPF routes will be forwarded from R5 to area 1.

A.
R5(config-router)# area 1 stub
R6(config-router)# area 1 stub

B.
R5(config-router)# area 1 stub no-summary
R6(config-router)# area 1 stub

C.
R5(config-router)# area 1 nssa
R6(config-router)# area 1 nssa

D.
R5(config-router)# area 1 nssa no-summary
R6(config-router)# area 1 nssa