Which of the following statements is true?
A. To be a good driver, you must look ahead, to the sides, and behind your vehicle.
B. Assuming that a train is not coming is one of the leading causes of fatalities at railroad crossings.
C. Before turning right, make sure that there is no traffic approaching from your left and no oncoming traffic turning into your path.
D. all of the above
Answer: D. all of the above
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