Which Statement Best Describes Why Exercise Can Increase the Ability

Which statement best describes why exercise can increase the ability of the body to utilize insulin more effectively?

A) Exercise stimulates the beta cells of the pancreas to produce more insulin.
B) Exercise increases your heart rate and therefore your blood flow getting insulin to the cells faster.
C) Exercise increases your metabolic activity rate.
D) Exercise triggers the formation of GLUT4 receptors on the plasma membrane of skeletal muscle cells and adipocytes.
E) Exercise increases the secretion of glucagon.