If You Wanted to Use an Interrupted Time Series Design

Multiple Choice

If you wanted to use an interrupted time series design to examine if lowering the legal limit of blood alcohol level (BAL) for driving under the influence affected the frequency of arrests,you would

A) compare a state with a higher BAL to one with a lower BAL.
B) measure the number of arrests just before and immediately after a law lowering BAL.
C) measure the number of arrests regularly for an extended period of time before and after a law lowering BAL.
D) correlate the amount of alcohol consumed by an individual and the number of times they have been arrested.