A co-worker is developing an implementation plan for a design that uses OSPF 2 and RIPv2 routing domains, with two routers redistributing between the two domains.The co- worker asks your help in choosing how to prevent domain loops by setting administrative distance. Assuming all other related settings use defaults, which of the following would solve the domain loop problem?（）

• A、The distance ospf intra - area 80 inter - area 80 OSPF subcommand
• B、T he distance ospf external 80 OSPF subcommand
• C、The distance ospf intra - area 180 inter - area 180 OSPF subcommand
• D、The distance ospf external 180 OSPF subcommand