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I. Formed when molten magma cools.
II. Formed when igneous and metamorphic rocks heat-up.
III. Formed when sediment is compacted over time.
a. metamorphic, igneous, sedimentary
b. igneous, metamorphic, sedimentary
c. sedimentary, igneous, metamorphic
d. igneous, sedimentary, metamorphic
What is b. igneous, metamorphic, sedimentary.