What type of infrastructure is necessary for CNG refueling stations?

The need for compressed natural gas (CNG) refueling stations centers on specific infrastructure requirements, which primarily include storage tanks and dispensing units. These components are critical for the safe and efficient storage of CNG, which is stored at high pressure, and for delivering it to vehicles.

Storage tanks are designed to hold CNG securely, maintaining the necessary pressure and ensuring safety standards are met. Dispensing units are the means through which the CNG is transferred to the vehicles; they must be equipped to handle the unique properties of natural gas, including its high pressure.

While options such as fast-food services, warehouse facilities for spare parts, and maintenance workshops may enhance the customer experience or support vehicle operation, they do not constitute the fundamental infrastructure required for a CNG refueling station to function. Proper storage and dispensing capabilities are essential for the operation, safety, and regulatory compliance of any CNG refueling facility, which underscores the importance of option B as the correct answer.