This imaging tool can tell you the speed and direction of blood flow.

a. ultrasound

b. CT

c. MRI

d. none of the above

The correct answer is letter a. Ultrasound. An ultrasound machine allows doctors to study or monitor a patient's internal organs, and it is usually used in pregnant patients to monitor their developing fetus, in this case the ultrasound can also be used to tell a person the speed and direction of his or her's bloodflow, because the ultrasound machine can be used to study a person's heart or blood vessels