Fact 1: Extreme heat and pressure change rock into metamorphic rock.

Fact 2: Sedimentary rock changes into a different form when it undergoes heat, pressure or other forces.

Given the two facts above, answer the question "What makes sedimentary rock turn into metamorphic?" with the following options: 
- crust
 - erosion
 - thrust
 - wind
 - two
 - coal
 - calcite
 - Force


 

        Force 