Referring to the network illustrated in the exhibit, how does router A reach destinations in area
49.2222?
A.
Router A will use the routes from area 49.2222; it learns from router B
B.
Router A will see the attached bit from router B and create a default route
C.
Router A must have a default route manually configured
D.
Router A will receive a default route in the IS-IS update from router B