How Does the Kinetic Energy of the Hot and Cold

Multiple Choice

How does the kinetic energy of the hot and cold bricks below change as time passes?

A) The kinetic energy of the bricks does not change as time passes.
B) Kinetic energy increases in both blocks.
C) Kinetic energy in the hot block decreases, and kinetic energy in the cold block increases.
D) Kinetic energy in the hot block increases, and kinetic energy in the cold block decreases.
E) Kinetic energy decreases in both blocks.