Final answer:
Hyperparathyroidism is a condition where the parathyroid glands produce too much PTH, which increases blood calcium concentrations. Glucocorticoids diminish intestinal transport of calcium. Therefore, the correct answer is B. To decrease calcium absorption.
Step-by-step explanation:
Hyperparathyroidism is a condition where the parathyroid glands produce too much parathyroid hormone (PTH). PTH increases blood calcium concentrations by enhancing reabsorption of calcium by the kidneys and stimulating calcium absorption by the digestive system. Glucocorticoids, on the other hand, diminish intestinal transport of calcium. Therefore, the correct answer is B. To decrease calcium absorption.