Final answer:
The question is asking about the frequency of traffic crashes in 2015, but the necessary information is missing to give a specific answer.
Step-by-step explanation:
The question is asking how often a person was injured in a traffic crash in 2015. The options are hour, day, week, and month. To answer this question, we need to find the total number of traffic crashes in 2015 and divide it by the total number of hours, days, weeks, or months in 2015, depending on the option chosen. Unfortunately, the provided information does not include the total number of traffic crashes in 2015, so we cannot give a definite answer. However, if we had that information, we could calculate the frequency of traffic crashes using the provided options.