Answer:
C. Cyanosis
Explanation:
Cyanosis is a sign or symptom that can be noticed by the purplish-blue coloration of the skin, under the nails, the resorption of the lips and eyes or the mucous membranes. Cyanosis occurs due to poor oxygenation of the arterial blood and is a symptom of circulatory insufficiency, lung disease or toxic gas poisoning. Among the options given in the above question, cyanosis is the factor that indicates that the client's condition lasted more than 1 hour.