What does a warning sign typically look like?

Answer: C — Yellow and diamond-shaped

A warning sign is designed to alert drivers to potential hazards or changes in road conditions. The typical appearance of warning signs is yellow in color and diamond-shaped, which is a standardized format used internationally to ensure that they are easily recognizable. The yellow color is chosen because it is highly visible and often associated with caution, effectively drawing drivers' attention to the need to be vigilant. In contrast, square and blue signs are generally associated with informational signs, indicating services or points of interest. Rectangular and green signs usually convey guidance or directional information rather than warnings. Red and circular signs represent stop or prohibition signals, commanding immediate compliance from drivers, rather than simply cautioning them about hazards. Understanding these distinctions is essential for safe driving and recognizing different types of road signs.