In Which Are the Molecules Moving Faster: a Swimming Pool

Multiple Choice

In which are the molecules moving faster: a swimming pool of boiling water or a cup of boiling water?

A) The swimming pool of boiling water because it contains more energy.
B) The cup because the molecules rebound off the container's inner surface more frequently.
C) The average motion of the molecules in each is the same.
D) There is insufficient information given to determine where the molecules move faster.