Ernesto wants to know what effect teenage drivers have on the overall safety of public roads and highways. Which of the following research questions would best help Ernesto find information about his topic?
A.
Should teenagers be allowed to drive on public highways?
B.
Can car manufacturers improve vehicle safety for teen drivers?
C.
How many teenagers in the U.S. drive to school every day?
D.
What percentage of motor vehicle accidents involve teen drivers?