A New Law Has Been Enacted Increasing the Penalty for Drunk

Multiple Choice

A new law has been enacted increasing the penalty for drunk driving in order to reduce the number of alcohol-related traffic fatalities. The number of fatalities one year before and after the law was enacted is measured, as well as a count of the number of high-profile accidents. The experimental stimulus in this project would be:

A) the new law.
B) the rate of traffic fatalities before the law began.
C) the number of traffic fatalities after the law was enacted.
D) the number of arrests for driving under the influence after the law began.
E) the number of high-profile traffic accidents.