You may not park within how many feet of a fire hydrant?

Answer: D — 15 feet

Keep a clear space around a fire hydrant so firefighters can reach it and lay hoses quickly in an emergency. The minimum distance you must stay away is 15 feet. This gap prevents your car from getting in the way while crews connect equipment and work near the hydrant. Parking any closer could block access and slow response, which is why you should not park within that zone. If you’re unsure where the hydrant is, choose a spot farther away and, in some places, parking within 15 feet can lead to fines or towing.