Select the correct statements regarding the effects of parathyroid hormone (PTH) on different organs:-

A. PTH enhances the reabsorption of calcium in the kidneys and promotes the activation of vitamin D.
B. PTH reduces the reabsorption of phosphate in the kidneys and promotes calcium influx from the bone to the blood.
C. PTH decreases the absorption of calcium in the intestine and reduces bone resorption.
D. PTH increases urinary calcium excretion and decreases the blood calcium level.