Refer to the exhibit. ROUTE.com is planning to implement a secure OSPF network to support traffic between clients on the 172.16.10.0/24 network and the file server on the 172.16.20./24 network. You have been asked to review the implementation and verification plans for this OSPF project. Which statement about the plan is true? （）

• A、It is complete as written
• B、It should include a task that verifie s that the interarea routes are using the proper MED
• C、It should include a task that verifies that load sharing is active on R1 and R4
• D、It should include a task that verifies that all redundant links will become active when the primary links are sh ut down