19. What is Corrigan's pulse?

A. A rapid and forceful distension of the arterial pulse with a quick collapse.

B. Systolic contraction and diastolic dilation of the pupil.

C. A decrease in diastolic blood pressure of 15 mmHg when the arm is held above the head.

D. Systolic and diastolic sounds heard over the femoral artery ("pistol shots").