Which of the following is a consequence of improper cabin pressure management?

Improper cabin pressure management can lead to significant physiological effects on passengers, making nausea and discomfort among the most common symptoms. When the cabin pressure is not maintained within safe and comfortable levels, passengers may experience hypoxia, which is reduced oxygen availability in the body. This can lead to feelings of dizziness, headaches, and even nausea as the body struggles with the lower oxygen levels compared to sea-level conditions. Ensuring proper cabin pressurization is crucial for maintaining a comfortable environment and managing the well-being of passengers throughout their flight.

In contrast to this, improved engine performance, improved flight time, and increased cargo capacity are not outcomes associated with improper cabin pressure management. Rather, they shine light on the aspects of flight operations that are independent of passenger comfort and physiological responses.