In a Patient with Coronary Artery Disease,beta-Blocking Medications May Be

In a patient with coronary artery disease,beta-blocking medications may be prescribed.Which of the following statements BEST describes the reasoning?

A) Beta-blockers lower resting heart rate,increasing diastolic filling time.
B) Beta-blockers lower the intramyocardial pressures,increasing muscle relaxation.
C) Beta-blockers lower the vasomotor tone in the media,increasing the diameter of the artery.
D) Beta-blockers lower the aortic pressure during systole,increasing blood flow to coronary arteries.