Which three statements are true of the whichita tribe

How would i answer this for an exam?

Ineed quickly! which of the following would not be considered an example of the transition of europe into the formation of larger nation-states? a. the hundred years' war b. the unification of italy c. the marriage of isabella and fernando d. the height of feudalism

What is an additional type of erosion found at the coast? what does it mean?