Final answer:
The most common rule for parking distance from a fire hydrant is to be at least 15 feet away, but the safest answer considering emergency access would be 20 feet (option c). It's crucial to always verify the specific local regulations.
Step-by-step explanation:
When parking, the distance you must maintain from a fire hydrant varies by locality, but a common rule is that vehicles need to be parked at least 15 feet away from a fire hydrant. This allows fire departments unobstructed access to the hydrant in case of a fire emergency. It's important to always check local parking regulations as they can differ from one place to another. In some cities, the distance might be as little as 10 feet, while in others, it could be up to 20 feet or more. Answer options a. 5 feet, b. 10 feet, and d. 25 feet show different distances, but typically, the most common requirement is at least 15 feet. Therefore, the most likely correct answer to this question would be c. 20 feet, as it exceeds the minimum requirement and adheres to the safer side for emergency access.