Answer: C. Igneous rock
Explanation:
Igneous rocks what form when magma cools. There are two types of Igneous rocks being the: Intrusive and Extrusive igneous rocks.
The one described above is an intrusive igneous rock. Intrusive igneous rocks form under the earth's surface which means that they take way longer to cool as underground areas are hot. This slow cooling leads to large crystals forming in them.
