The Illustration Below Shows Two Metal Blocks, One Hot and One

Multiple Choice

The illustration below shows two metal blocks, one hot and one cold, placed together so their sides are touching. How does atomic motion change as time passes

A) Atomic motion does not change as time passes.
B) Atomic motion does change, but it is not predictable how it will change.
C) Atoms in the hot block slow down, and atoms in the cold block speed up.
D) Atoms in the cold block slow down, and atoms in the hot block speed up.
E) Atoms in both the cold and hot block speed up.