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Question:

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

A Doubles/triples turn over from quick steering moves more easily than many vehicles.
Explaination

Please see See figure 6.1. Rigs with the least crack-the-whip effect are shown at the top and those with the most, at the bottom. Rearward amplification of 2.0 in the chart means that the rear trailer is twice as likely to turn over as the tractor. You can see that triples have a rearward amplification of 3.5. This means you can roll the last trailer of triples 3.5 times as easily as a 5-axle tractor.