How does continuous high-speed driving affect fuel consumption?

1. A.It reduces fuel consumption as long as the road is straight.
2. B.It reduces fuel consumption.
3. C.It increases fuel consumption.
4. D.It uses the same consumption of fuel as lower speed driving.

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.