A study found that people who suffer from obstructive sleep apnea are at increased risk of having heart disease. Identify the two events described in the study. Do the results indicate that the events are independent or dependent? A. Study and heart disease B. Having sleep apnea and not having it C. Sleep apnea and heart disease D. Study and sleep apnea

The two events described in the study are the presence of sleep apnea and the risk of heart disease, which means the correct choice is C. Sleep apnea and heart disease. The results indicate that these events are dependent, as having obstructive sleep apnea is associated with an increased risk of developing heart disease, suggesting that one event influences the other.