In His Study of American Cities, Professor Smith Finds a Strong

In his study of American cities, Professor Smith finds a strong positive correlation between the number of preschools and the number of bars. What is the most likely explanation of this relationship?

A) Parents of small children need to take an occasional break.
B) The relationship is due to a third variable, population size.
C) Confounding variables explain the relationship.
D) People who regularly frequent bars often meet their life partner and procreate.