Which of the following describes skepticism about one thing causing another?

Your patient is a 30-year-old woman with a stab wound to the neck. She is sitting up and appears very anxious and short of breath. Minimal external bleeding is noted, but there is bubbling from the wound. Which of the following should you suspect, based on the mechanism of injury and assessment findings?

A) Laceration of the trachea B) An injury to the spinal cord at the level of the stab wound C) Laceration of the ipsilateral carotid artery D) All of the above

Which of the following components are designed to limit the penetration of smoke, heat, and toxic gases into the stairway?

A. Vertical exits B. Horizontal exits C. Exit passageways D. Smokeproof enclosures