Which parameter would you tune to affect the selection of a static route as a backup, when a dynamic protocol is also being used?

An online retailer knows their incremental effect from Facebook ads from their previous Conversion Lift test. They want an always-on attribution solution that allows them to allocate its budget across publishers on an ongoing basis. The challenge is identifying a model that is as close to their true business value as possible.
Refer to the following results:

Which Attribution model should the retailer choose?

Which statements are true about EIGRP successor routes? (Choose two.)

After the network has converged, what type of messaging, if any, occurs between R3 and R4?

OSPF is configured using default classful addressing. With all routers and interfaces operational, how many networks will be in the routing table of R1 that are indicated to be learned by OSPF?