Which of the following describes a symptom of severe carbon monoxide poisoning?

Severe carbon monoxide poisoning can manifest with a range of symptoms due to the gas's effects on the body. The correct response indicates that all listed symptoms—fatigue, confusion, and nausea/vomiting—are indeed associated with severe exposure to carbon monoxide.

Fatigue occurs because carbon monoxide interferes with the body's ability to transport oxygen, leading to reduced energy levels and overall lethargy. Confusion arises as the brain begins to suffer from lack of oxygen, impairing cognitive functions and leading to disorientation. Nausea and vomiting can result from the body’s neurological responses or due to a toxic reaction as carbon monoxide accumulates in the bloodstream.

Recognizing that all these symptoms can indicate severe poisoning highlights the importance of monitoring for multiple indicators and understanding their interconnected nature in the context of carbon monoxide exposure. This comprehensive perspective is crucial for effective diagnosis and timely intervention in instances of potential carbon monoxide poisoning.