A student is examining an igneous rock. She notices that it has many crystals that are different colors
and can be seen without the aid of a hand lens. She identifies the rock as granite. Based on the
information, what can she conclude about the origin of therock?

A.) it’s an extrusive rock and cooled rapidly at the surface
B.) it’s an extrusive rock and cooled slowly at the rock
C.) it’s an intrusive rock and cooled rapidly below the surface
D.) it’s an intrusive rock and cooled slowly below the surface