If you want to travel from St. Louis, Missouri, to Atlanta, Georgia, by car you need what to plan your trip

The answer is d if you are on edgenuity. 

I'm pretty sure it's c. extremely gradual but not 100% sure though.

Magma forms by partial melting of upper mantle and crust. partial melt means that only a fraction of the available material forms a melt, and that the remainder stays solid. the partial melt rises because of its lower density and ascends through he crust. this is so conclusive mean the answer would be magma igneous rocks or balistic magma.