Which three disadvantages of connecting an on-premises private cloud to a colocation facility versus a cloud VPN are true? (Choose three)

You are the lead network designer for an enterprise company called ABC, and you are leading design discussions regarding IPv6 implementation into their existing network. A question is raised regarding older Layer 2 switches that exist in the network, and if any changes are required to these Layer 2 switches for successful IPv6 implementation. Which two responses should you give? (Choose two.)

Refer to the exhibit. This DMVPN network is running OSPF in a single area. A network engineer notices that traffic destined to the data center from one of the spokes is using another spoke as the next hop. It is preferred that all traffic destined to the data center uses the least amount of hops.

Which solution resolves this issue with the minimum amount of changes on the network?

Refer to the exhibit.

As part of your design to monitor reachable services, a route health injector has just been deployed on the network. The route health injector injects /32 host routes into BGP with the next hop of 192.18.0.2, but the /32 routes are not being installed into the RIB or FIB of Router A.
Which BGP feature must be deployed to make be deployed to make the design to work?

The following exhibit shows the design of this redundant network which uses EIGRP as the IGP of choice.
What is the advantage of using BFD in this design?