A study of traffic violations on a busy highway finds that the number of tickets for speeding written by officers tends to decrease on rainy days. A police sergeant explains that driver behavior could be a confounding variable.
Answer
A
On sunny days, more tickets for speeding are written than on rainy days.
B
Officers are less likely to want to leave their police cars to write tickets on rainy days.
C
Drivers may drive more carefully on rainy days, so the number of speeding tickets decreases.
D
Drivers are more likely to speed on rainy days to get to their destination faster.