Recall the Application About the Response of New York City

Recall the Application about the response of New York City cab drivers to an increase in cab fares to answer the following question(s) .
-Recall the Application.A study of the taxi market in New York City showed that in 2004,a 19 percent increase in the regulated fare

A) did not change the miles driven per cabbie.
B) increased the miles driven per cabbie.
C) decreased the miles driven per cabbie.
D) All of the above represent results of the study.