Correct answer: B. To avoid severe bouncing.
Drivers should drive more slowly on an uneven road surface because driving a tractor at speed could cause the vehicle or the trailer to become unstable and difficult to control. During severe bouncing the tractor's wheels can lose contact with the road, negatively affecting steering and braking.
This is an official-style question from the Control of Vehicle topic of the Ireland driver theory test (Cat. B). Practise all 807 questions free on iTest.ie — with timed mock exams, automatic mistake tracking and progress sync across devices.
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