Which Statement Accurately Describes Total Blood Flow

Which statement accurately describes total blood flow?

A) Total blood flow equals cardiac output and is a fixed number given that there is a finite amount of blood in the body.
B) Total blood flow equals cardiac output and can vary significantly over time with activity levels.
C) Total blood flow is measured as the sum of blood flow to upper and lower extremities and is measured in liters.
D) Total blood flow is measured as the sum of blood flow to upper and lower extremities and is measured in beats per minute.
E) Changes in total blood flow are accompanied by equivalent changes in local blood flow in all areas of the body.