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Question:

This octagonal (eight-sided) sign is

A
Explaination

The only octagonal (eight-sided) traffic signs are stop signs. A stop sign has the word "STOP" printed in white on a red background. At a stop sign, you must stop before the stop line, crosswalk, or intersection, whichever you arrive at first. You should stop for at least three seconds so you can look left and right. Then yield to pedestrians and other vehicles, and proceed only when it is safe to do so.