What type of warnings might a pilot expect when cabin altitude reaches harmful levels?

When cabin altitude reaches harmful levels, a pilot can expect both visual and auditory warnings. These alerts are critical because they help ensure the safety of the aircraft and its occupants.

Visual warnings might include lights or displays on the cockpit instruments that indicate rising cabin altitude, allowing the pilot to quickly recognize a dangerous situation. Auditory warnings, such as alarms, serve as an immediate, attention-grabbing alert to ensure that the pilot is aware of the urgent need to take action. The combination of both warnings enhances the likelihood that the pilot will respond promptly to prevent hypoxia and other dangers associated with high cabin altitude. This multifaceted warning system is essential in maintaining awareness and facilitating quick decision-making in high-stress situations.

The other options suggest either limited or no warning systems, which would compromise safety by not alerting the pilots adequately to a hazardous situation.