Correct answer: B. It can reduce and distort the beam.
A driver is responsible for their vehicles roadworthiness and they should check it at regular intervals. Among the checks they should make are that all the lights are in working order. If they find defects in the lights, such as a broken lens, they should have them repaired or replaced as soon as possible.
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.
Practise the full question bank free →