Refer to the diagram.

Which OSPF configuration command is required to configure Area 3 as a totally stubby area?

A.
On the ABR
router ospf 10
area 3 nssa

B.
On the ABR
router ospf 10
area 3 stub

C.
On all Area 3 routers
router ospf 10
area 3 stub no-summary

D.
On all Area 3 routers
router ospf 10
area 3 stub

E.
On the ABR
router ospf 10
area 3 stub no-summary

Explanation:
To make an area “totally stubby” we must apply the “area area-idstub no-summary” command

on the ABR (the middle router in this case) and area area-id stub” commands to all other routers
in that area.