Officer James has noticed a strong positive correlation between the speed of the vehicles on Main Street and the number of accidents. In order to determine if the speed is causing the accidents, which experiment would be best? Officer James could make cars go fast and see if they crash. Officer James could view traffic cameras to determine the speed of some cars and compare the speed of the cars that wrecked to the speed of those that did not. Officer James could survey everyone who is in an accident and ask how fast they were going. Officer James could try to find someone who got in an accident while driving slowly.

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