Alcohol and other drugs were involved in approximately of all fatal crashes
a) 70%
b) 50%
c) 40%

The correct answer is B) 50%. This accounts for all types of driving while intoxicated. In the remaining 50% there's things like falling asleep due to exhaustion, sickness or disease that causes the driver to faint. Cell phone usage also causes a significant amount of accidents, as well as cars breaking down.

You can literally find this on google of each science career and search up what type of training you need and how many years in school