You are presented with the question "What can change rock into marble?" and the following answer choices: 
- extreme heat and pressure
 - heat is produced
 - air pressure
 - It gets heated up
 - barometric pressure
 - slow heat transfer
 - heat production
 - exposure to cold

Now knowing that extreme heat and pressure change rock into metamorphic rock and marble is a metamorphic rock, choose the best answer.


 

 extreme heat and pressure        