What is the heated rear window for?

What is the heated rear window for?
A)To remove ice from the inside of the windows.
B)To remove fog from the outside of the windows.
C)To remove fog from the inside of the windows and ice from the outside.Correct
In winter or when atmospheric conditions are adverse, a layer of ice may form on the outside of the windows, or the inside may fog up. To prevent this, we will activate the heated rear window which, by means of small electrical resistors, heats the window and removes ice and fog.