Speed limit signs are

Speed limit signs are

• A. Triangular in shape, white background with a red border
• B. Triangular in shape, red background with a white border
• C. Circular in shape, white background with a red border
• D. Circular in shape, white background with a red border

 

The correct answer is option C. Circular in shape, white background with a red border. Can you explain this answer in the comments?

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