Refer to the exhibit. R1 accesses the Internet using E0/0. You have been asked to co nfigure R1 so that a default route is generated to its downstream devices (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 2 0.0.0.0
• 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