What factors increase thrust per 100 RPM near the top of thrust levers?

The correct choice identifies the factors that enhance thrust output as engine RPM (revolutions per minute) increases, particularly near the upper range of thrust lever settings.

When RPMs increase, the engine's capacity to generate thrust correspondingly rises due to greater rotational speed and improved airflow dynamics through the engine. Increased mass flow, referring to the volume of air and fuel mixture entering the combustion chamber, is crucial because a larger mass flow enhances combustion efficiency and overall thrust generation. Higher temperatures facilitate a more vigorous reaction within the engine, resulting in an increase in the energy released during combustion, thereby contributing to greater thrust production.

Furthermore, compressor efficiency plays a significant role in thrust generation. An efficient compressor optimally compresses the incoming air, which, when mixed with fuel and ignited, leads to higher thrust levels. Therefore, the combination of increased RPMs, mass flow, temperature, and compressor efficiency directly correlates with maximizing thrust per 100 RPM at the upper limits of engine performance.