A Network Administrator Is Implementing OSPF, Where There Are Two

A network administrator is implementing OSPF, where there are two exit points. Each exit point has a stateful, application inspection firewall to implement company policies. What would the best practice be to ensure that one firewall will see both directions of the traffic, preventing asynchronous connections in the network?

A) Both ASBRs should define External Type 1 routes for the external routes, using a different initial cost value for each ASBR.
B) Both ASBRs should define External Type 1 routes for the external routes, using the same initial cost value for each ASBR.
C) Both ASBRs should define External Type 2 routes for the external routes, using the same initial cost value for each ASBR.
D) Both ASBRs should define External Type 2 routes for the external routes, using a different initial cost value for each ASBR.