Which object has the least thermal energy?

 - a blueberry muffin at a temperature of 26°C
 - a blueberry muffin at a temperature of 18°C
 - a blueberry muffin at a temperature of 25°C
All three blueberry muffins have the same mass but different temperatures. Since the 18°C muffin is the coldest, it has the least thermal energy.