PTH is secreted in a regulated manner.Which of the following directly increases PTH synthesis,secretion,or both?

A)Elevated 1,25-dihydroxyvitamin D
B)Decreased blood phosphate levels (hypophosphatemia)
C)Decreased blood Ca⁺⁺ levels (hypocalcemia)
D)Elevated blood K⁺ levels (hyperkalemia)
E)Elevated Mg⁺⁺ levels (hypermagnesemia)