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How much water is needed on a road surface for a vehicle to hydroplane?
A.  Usually several inches
B.  A good amount, such as a large puddle
C.  A small amount
D.  No water
Hydroplaning is an effect in which a vehicle's tires lose traction with the surface of the road and instead glide along a layer of water. There does not have to be much water on the road for this to occur.
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