How far should a vehicle be parked from a fire hydrant?

Answer: B — 10 feet

The correct distance for parking from a fire hydrant is 10 feet. This ensures enough space for the fire department to access and use the hydrant in case of an emergency. Option A of 5 feet is too close and could potentially block the hydrant or hinder fire truck access. Option C of 15 feet and Option D of 20 feet are both excessively far and may not be necessary. It is important to follow parking laws and regulations to ensure the safety and accessibility of emergency responders.