Which of the following classes of medication decreases heart rate, contractility, and blood pressure, and is used to increase survival rates in post-myocardial infarction patients?

A. ACE inhibitors primarily affect blood pressure and heart remodeling but do not directly decrease heart rate or contractility.

B. Vasodilators mainly lower blood pressure by expanding blood vessels and do not primarily affect heart rate or contractility.

C. Beta blockers decrease heart rate, contractility, and blood pressure, and are specifically used to improve survival after a heart attack by reducing the heart's workload and oxygen demand.

D. Diuretics primarily reduce blood pressure by decreasing blood volume but do not directly decrease heart rate or contractility.

A. Giving methylphenidate with food may help alleviate gastrointestinal side effects but is not directly related to sleep disturbances.

B. The timing of medication administration, particularly if methylphenidate is being given too late in the day, can contribute to sleep disturbances.

C. Sleep apnea is a significant concern but is not directly related to the child's sleep disturbances since starting methylphenidate.

D. While school performance may be impacted by sleep disturbances, addressing the timing of medication administration is more directly relevant to the child's sleep issues.