Which of the Following Factors Is Most Important in Matching

Which of the following factors is most important in matching the blood flow through a specific tissue with the metabolic needs of that tissue?

A) sympathetically induced vasoconstriction of the arteries supplying a tissue forces more blood to flow into the tissue.
B) parasympathetically induced vasodilation of the capillaries within a tissue allows more blood to flow into the tissue.
C) local changes within a tissue resulting from increased metabolic activity can produce local arteriolar vasodilation to allow more blood to flow into the tissue.
D) widespread venous vasoconstriction allows blood to dam up at the tissue level.
E) the amount of blood flowing through each tissue remains constant through reflex controls to ensure that metabolic needs are continuously met.