Final answer:
A blue curb means you may stop only with a disabled placard. Red means no stopping, green is timed parking, and yellow typically designates loading zones.
Step-by-step explanation:
The color of a curb that indicates you may stop only if you have a disabled placard displayed in your vehicle is blue. Curbs painted with other colors have different rules: red curbs typically mean no stopping, standing, or parking; green curbs usually indicate timed parking; and yellow curbs are often for loading zones. Therefore, the correct answer is A. blue.
The color of the curb that indicates you may stop only if you have a disabled placard displayed in your vehicle is blue.The color of a curb that indicates you may stop only if you have a disabled placard displayed in your vehicle is blue. Curbs painted with other colors have different rules: red curbs typically mean no stopping, standing, or parking; green curbs usually indicate timed parking; and yellow curbs are often for loading zones. Therefore, the correct answer is A. blue.