Correct answer
Distraction.
Distraction, at 30%; the table reports 28% for alcohol and 22% for inappropriate speed. These are concurrent factors rather than single or mutually exclusive causes: more than one can occur in a collision. The alcohol percentage also uses a specific sample with tests of all involved drivers, whereas distraction and speed use the total considered. This comparison concerns the published percentages for that report, year and geographic scope; it does not attribute every collision to a single cause or establish a universal ranking.
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Distraction.
Alcohol.
Inappropriate speed.
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