Which of the Following Statements Most Accurately Captures a Principle

Which of the following statements most accurately captures a principle of blood flow?

A) With constant pressure, a small increase in vessel radius results in an exponential increase in blood flow.
B) Blood flow is primarily determined by blood viscosity and temperature.
C) Blood flows most quickly in the small diameter peripheral capillaries.
D) Smaller cross-sectional vessel area is associated with lower flow velocity.