Which option best describes symptoms of smoke inhalation to monitor in passengers?

• A. Coughing only.
• B. Shortness of breath only.
• C. Dizziness only.
• D. Coughing, shortness of breath, dizziness, and confusion.

Answer: (D)

Smoke inhalation can affect both the airways and the body's ability to deliver oxygen, so monitoring a range of symptoms is crucial. Coughing shows airway irritation and potential inhalation injury; shortness of breath signals impaired gas exchange in the lungs; dizziness points to reduced oxygen delivery to the brain or the effects of carbon monoxide; and confusion indicates CNS involvement from hypoxia or toxic gases. Because these issues can appear together and evolve, recognizing all of them gives the clearest warning of a passenger in trouble. Focusing on only one symptom risks missing a developing and potentially serious condition, whereas this broader set captures the most important signs to watch for.