Please Read the Following Scenario to Answer the Following Question(s)

Please read the following scenario to answer the following question(s) .
Osteoporosis is a disease characterized by loss of bone mass and an increased susceptibility to bone fractures. It threatens more than half of all Americans over the age of 50. Women are about four times more likely to suffer from the disease than men. Osteoporosis may progress undetected until bones become so weak that they break during common activities. Prevention of osteoporosis includes regular weight-bearing exercise, recommended intake of calcium and vitamin D, and avoidance of smoking and excessive alcohol.
-Soon after eating a calcium-rich breakfast of yogurt and fortified cereal,your blood levels of calcium increase,stimulating the release of ______.

A) insulin
B) parathyroid hormone
C) glucocorticoids
D) calcitonin