Designing Cisco Network Service Architectures (ARCH) (#167)

Two companies want to merge their OSPF networks, but they run different OSPF domains. Which option must be created to accomplish this requirement?

OSPF virtual link to bridge the backboneareas of the two companies together
Area on the ASBR of each company with the same area ID to bridge the networks together
redistribute routes between domains
NSSA on the ASBR of each company