a decrease in the mass of the ice cubes an increase in the mass of the ice cubes a decrease in the temperature inside the freezer an increase in the temperature inside the freezer
I gave my students this multiple choice question: The ice cubes in a freezer are melting. Which change most likely is causing the ice cubes to melt?

Only one answer is correct among these 4 choices:
- a decrease in the mass of the ice cubes
- an increase in the mass of the ice cubes
- a decrease in the temperature inside the freezer
- an increase in the temperature inside the freezer

Could you tell me which one is correct?

an increase in the temperature inside the freezer