Which of the Following Statements Best Describes Mean Arterial Pressure

Which of the following statements best describes mean arterial pressure (MAP) ?

A) It represents the amount of end diastolic volume that is ejected from the heart by contraction of the left ventricle.
B) It represents the force exerted by the blood on the walls of blood vessels during the contraction of the ventricles.
C) It represents the resistance against which the ventricles must contract in order to eject blood into systemic circulation.
D) It represents the depolarization of the AV node that is carried into the ventricles by the atrioventricular bundle.
E) It represents the volume of blood ejected with each contraction of the left ventricle.