Refer to the exhibit.

Which two configuration options can be used to optimize the IS-IS network scenario? (Choose
two.)

A.
Change the R1 and R2 IS type to Level 2.

B.
Change the R1 and R2 IS type to Level 1.

C.
Change the gi0/0 interface IS-IS circuit type on R1 and R2 to Level 2 only.

D.
Change the gi0/1 interface IS-IS circuit type on R1and R2 to Level 1.

E.
Change the IS type for all the routers to Level-1-2.

F.
Change the IS-IS network type for all the routers to point-to-point.

Explanation: