How does a malfunctioning air compressor affect brake performance?

Answer: B — It leads to inadequate air supply

A malfunctioning air compressor significantly impacts brake performance primarily by leading to inadequate air supply. The air compressor is responsible for generating the air pressure necessary to operate the air brake system. If the compressor is not functioning correctly, it cannot maintain or build the required air pressure, which is essential for the brakes to engage properly. Without the adequate air supply, the brake chambers do not receive enough force to apply the brakes effectively, resulting in slower and less responsive braking. This scenario can compromise safety and increase stopping distances, as the vehicle cannot come to a stop as swiftly or reliably as it would with a properly functioning air compressor. The other options, while related to brake performance, do not pinpoint the core issue caused by a malfunctioning air compressor. For instance, while it may seem that a malfunctioning compressor could lead to overheating brakes due to prolonged use when they do not release properly, the primary direct effect is the lack of air supply. Improving brake sensitivity is not a consequence of a malfunctioning air compressor, and although the braking distance may increase as a result of inadequate pressure, it is the inadequate air supply itself that is the more direct issue stemming from the malfunction.