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Question:

Which of these statements about quick steering movements and doubles/triples is true?

A Doubles/triples flip over from quick steering movements more easily than do many other vehicles.
Explaination

Because of rearward amplification (the "crack-the-whip" effect), steering changes affect the rearmost trailer much more than they affect the front trailer or the tractor. Avoid quick or sharp steering changes that could cause the rearmost trailer to roll over.