Refer to the exhibit.

R1 accesses the Internet using E0/0. You have been asked to configure R1 so that a default route
is generated to its downstream neighbors (191.0.0.1 and 192.0.0.1). Which commands would
create this configuration?

A.
router eigrp 190
redistribute static
!
ip route 0.0.0.0 0.0.0.0 Null0

B.
ip default-network 20.0.0.0

C.
router eigrp 190
redistribute static
!
ip route 0.0.0.0 255.255.255.255 Null0

D.
ip default-network 20.20.20.0

Explanation:
Since you are running EIGRP and you have other routers that need a default route, you can use
EIGRP to distribute that without having to program static routes in each. Since 2 are default routes
they are only used on the router that they are configured on. The first option has you configure the
static route as well as a way to redistribute that route to other routers connecting to you via
EIGRP. This will essentially publish this route the same as if it were programmed in with the
network x.x.x.x sub-command in the router eigrp 100 routing table.