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Question
Before changing lanes on a multilane highway, you should:
Answers
A.  Sound your horn.
B.  Turn on your headlights.
C.  Reduce your speed.
D.  Check your mirrors and blind spots.
Explanation
Before changing lanes, you should look in your rearview and side mirrors to make sure no one is trying to pass you. You should also look over your shoulder to make sure that no one is in your blind spot.
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