What are the symptoms of carbon monoxide poisoning?

The correct choice identifies the symptoms of carbon monoxide poisoning, which can manifest in varying degrees of severity. Mild symptoms such as headache, weakness, confusion, and dizziness are often the initial indicators that a person may be experiencing exposure to carbon monoxide. This is due to the way carbon monoxide interferes with the body's ability to transport oxygen, leading to these early, nonspecific symptoms.

As exposure continues or increases, individuals may experience more severe symptoms, which can include nausea, shortness of breath, and loss of consciousness. Recognizing these initial mild symptoms is crucial for prompt intervention, as early treatment can prevent the progression to more severe health outcomes.

The other choices misrepresent the symptoms associated with carbon monoxide poisoning. Some suggest that only severe symptoms occur or imply that symptoms remain consistently mild without worsening, which does not accurately reflect the potential progression of symptoms based on exposure levels.