How can CNG fuel efficiency be improved?

Answer: C — By regular vehicle maintenance and proper tire inflation

Improving CNG fuel efficiency primarily hinges on maintaining the vehicle in optimal condition and ensuring that all components are functioning as intended. Regular vehicle maintenance helps ensure that the engine operates smoothly, which is crucial for achieving maximum fuel efficiency. An efficiently running engine burns fuel more completely and effectively, minimizing waste. Proper tire inflation is also critical. Tires that are not inflated to the correct pressure can increase rolling resistance, which requires more energy (and fuel) to move the vehicle. Well-inflated, high-quality tires reduce the energy needed to maintain speed, thus enhancing overall fuel efficiency. Together, routine maintenance and correct tire pressure management contribute significantly to a vehicle's ability to maximize the efficiency of CNG fuel use. In contrast, options that focus on tank size or tire quality do not address the core issue of maintaining vehicle efficiency. Increasing the size of the fuel tank does not inherently improve how efficiently the current fuel is used; it merely allows for longer driving ranges between refueling. Similarly, using lower-grade tires can lead to decreased performance, increased wear, or reduced efficiency due to higher rolling resistance. Reducing the frequency of maintenance can lead to deteriorating vehicle performance, ultimately negatively impacting fuel economy. Therefore, regular vehicle maintenance and proper tire inflation stand out as