5.) The blood velocity in aorta can be measured directly using ultrasound. The graph below shows the blood velocity versus time for a single heartbeat. Which statement best describes the graph? (a) The acceleration Of the blood is greatest in magnitude at about 0.25 s; (b) the acceleration of the blood is greatest in magnitude at about 0.10 s; (c) the blood flow changes direction at about 0.25 s; (d) the speed of blood flow begins to decrease at about 0.10 s. o O 1.0 0.6 0.2 0.25 0.50 0.75 1.00