A student's research shows that there were more accidents in 2015 than there were in 1915. He concludes that people were better drivers in 1915 than in 2015.What would be a more appropriate or valid measure for this comparison? A.Compare the number of people who don't have an accident for 1915 and 2015 B.Compare the number of car accidents in those years, grouped by region C. Compare the number of car accidents in 1905 and 2005 D.Compare the accident rates(percentages) for 1915 and 2015

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