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Which of the following could reduce the amount of space between the road surface and an overhead object, such as a bridge?

A A repaving of the road
Explaination
You should not assume that signs marking the height of a bridge or overpass are exactly correct. If the road was repaved after the sign went up, or if snow is on the ground, the clearance may be different than what the sign indicates. more
B Wind
C An increased amount of traffic
D Rain