What effect does spilt diesel have on a road?

1. A.It increases tyre noise.
2. B.It makes the road more slippery.
3. C.It improves the vehicle's braking ability.

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.