A student claims that thermal energy transfers between objects. Which of the following will test the student’s claim?

A. Place a glass of room temperature water out on the counter, and monitor its temperature.
B. Place ice cubes into a mug of hot chocolate and watch as the hot chocolate melts the ice cubes.
C. Place a slice of room temperature bread in a toaster and monitor the temperature of the toaster.
D. Place a container of ice cream in the freezer and watch as the freezer keeps the ice cream from melting.