Q: Fact 1: Extreme heat and pressure change rock into metamorphic rock. Fact 2: Slate is an example of a metamorphic rock. Given the two facts above, extreme heat and pressure change rock into what?

A). electricity;
B). mines;
C). slate;
D). iron;
E). soils;
F). calcite;
G). water;
H). complex;
The answer is:
C).