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Which is a hazard warning line?

A Long white centre lines with small gaps
Explaination
You need to know the difference between the normal centre line and a hazard warning line. If there is a hazard ahead, the markings are longer and the gaps shorter. This gives you advanced warning of an unspecified hazard ahead.
B Short white centre lines with long gaps
C A solid single yellow line on the left hand side
D A solid double yellow line on the left hand side