Question

the most serious potential consequence of sleep apnea is _____.
risk of suffocation
tiredness during the day
permanent decrease in lung capacity
strain on the cardiovascular system

Explanation:

Sleep apnea can cause repeated drops in oxygen levels and changes in blood - pressure during sleep, which put a strain on the cardiovascular system. While risk of suffocation is a concern, it is less common compared to the long - term cardiovascular strain. Tiredness during the day is a common symptom but not the most serious consequence. A permanent decrease in lung capacity is not the most typical serious consequence of sleep apnea.

Answer:

D. strain on the cardiovascular system