What happens to the cabin altitude during a rapid descent?

During a rapid descent, the cabin altitude increases as the aircraft descends, which can lead to a significant difference between external altitude and cabin pressure. To maintain passenger safety and comfort, the aircraft's pressurization system automatically adjusts the cabin pressure to avoid rapid changes that could be harmful.

The pressurization system is designed to manage the altitude changes seamlessly, ensuring that the cabin altitude is controlled appropriately. This automatic adjustment helps to mitigate the effects of rapid descent, preventing any sudden decreases in cabin pressure that could lead to hypoxia or other complications. Through this system, the aircraft is able to pressurize the cabin effectively during such maneuvers, ensuring that occupants remain safe and comfortable during flight variations.

In contrast, other options suggest stability or manual control of cabin pressures which do not reflect the automatic operations of modern aircraft pressurization systems during rapid changes in altitude.