The temperature of a cup of hot coffee is 160 °F. After 20 minutes, the temperature is lowered to 75 °F. Which statement best describes this process?
1) The coffee cooled down by 85 °F in 20 minutes.
2) The coffee heated up by 85 °F in 20 minutes.
3) The coffee remained at the same temperature for 20 minutes.
4) The coffee temperature increased by 160 °F in 20 minutes.