Correct answer: D. They reflect light at night to make other road users aware of the vehicle.
Motor vehicles are fitted with red reflectors to make it easier to be seen by other road users. Drivers should keep reflectors clean, intact and check them by shining a light on them to make sure that they are working effectively. Whilst driving, drivers should be cautious as red reflectors may be an indication of both parked/stationery or moving vehicles ahead.
This is an official-style question from the Managing Risk 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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