Click the Exhibit button.

R5 must advertise Subnet A into IS-IS so that Subnet A and Subnet B can communicate. Subnet B must be able to forward traffic to Subnet A and towards Area 49.0001. However, R5 should not be able to route traffic from Subnet A to Area 49.0001.

Referring to the exhibit, how would you solve this problem?

A. Configure Level 2 on all links in Area 49.0002.

B. Configure the set protocols isis ignore-attached-bit parameter on R5.

C. Configure the set protocols isis overload parameter on R6.
D. Configure an export policy on R6 to reject all routes except Subnet B towards R5.