Answer :
Final answer:
A stop sign is an octagonal shape, making the correct option C. Octagon. It is designed with eight sides for high visibility to alert drivers to stop.
Explanation:
The correct option for the shape of a stop sign is C. Octagon. A stop sign is an octagonal shape with eight sides and is universally recognized with this particular shape to alert drivers to come to a complete stop at an intersection or traffic control point. This shape, along with its bright red color, helps to capture the attention of drivers and is designed for optimal visibility. Therefore, the stop sign is neither an upside-down triangle nor a diamond, but specifically an octagon as defined by traffic regulations and is widely used across various countries to ensure road safety.
