Eric observes a metamorphic rock that has flattened, ribbon-like layers of shiny, flattened crystals. what is the best explanation for how the rock was formed? a. compaction and cementation b. cooling of magma or lava c. erosion and melting d. intense heat and pressure inside earth i think it's d, but i'm not sure.

Yes D is correct, only logical answer

Metamocrphic rocks are created from sedimentary, igneous or other metamorphic roccks. They are formemd deep inside the earth. Heat and pressure from the rock above flatten and bend the rock or even exchange atoms, forming new minerals.
so D) is your answer

Hope that helps

7.5/3

Explanation:

easy divide pver 3