Which of the following is NOT an action of parathyroid hormone?

A) Decreases the release of phosphate from bone
B) Stimulates osteoclast activity resulting in the release of Ca²⁺
C) Stimulates increased reabsorption of Ca²⁺ in the kidneys
D) Stimulates absorption of Ca²⁺ from the small intestine
E) Increases enzymatic formation of active vitamin D

Parathyroid hormone (PTH) increases the release of phosphate from bone, not decreases it. PTH's main actions include stimulating osteoclast activity to release calcium and phosphate into the blood, increasing calcium reabsorption in the kidneys, indirectly stimulating calcium absorption from the small intestine by increasing the production of active vitamin D, and increasing the release of phosphate from bone to maintain calcium and phosphate balance.