Write a Short Statement That Expresses a Possible Function Between

Multiple Choice

Write a short statement that expresses a possible function between the given variables.
-(number of cars on road, air quality)

A) As the quality of the air deteriorates, the number of cars on the road decreases.
B) As the quality of the air deteriorates, the number of cars on the road increases.
C) As the number of cars on the road decreases, the quality of the air generally deteriorates.
D) As the number of cars on the road increases, the quality of the air generally deteriorates.