Correct answer: A. The driver's field of view is not good enough to allow safe overtaking.
You should always make sure that the road ahead is clear so that there is enough distance to allow you to overtake and get back to the correct side of the road without forcing any other road user to alter speed or course. In this case, the brow of the hill is too close to allow a driver to overtake safely.
This is an official-style question from the Safe and Responsible Driving 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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