Parking within how many feet of a fire hydrant is prohibited?

Answer: B — 15 ft

The key idea is keeping fire hydrants clear so firefighters can access them quickly. In California, you must not park within fifteen feet of a fire hydrant. The distance is measured from the hydrant to the nearest part of your vehicle. This buffer allows hoses to reach the hydrant and room for firefighters to work without obstruction, which can be critical in an emergency. Parking closer would block access and slow response, while parking farther away is still compliant but not necessary for safety.