What may be causing this?

Click on the exhibit.

The route table on router R2 shows the system address of router R5 but it does not show any of the interfaces from the non-OSPF area.

What may be causing this?
A . ‘asbr’ is missing from router R1’s configuration.
B . Router R1 needs to have an export policy added to it.
C . Router R5 does not have an export policy for these prefixes.
D . Router R1 needs to have an import policy added to it.