What Statement Best Describes the Function of Vasopressin Cells

What statement best describes the function of vasopressin cells.

A) Vasopressin cells act like neurons.
B) Vasopressin cells receive input about osmotic pressure, and, if high, release vasopressin into the circulation.
C) Vasopressin cells receive input about osmotic pressure, and, if high, generate action potentials which then activate endocrine cells in the pituitary to release vasopressin into the circulation.
D) Cells in the hypothalamus respond to high osmotic pressure and activate vasopressin cells in the pituitary, which then secrete vasopressin into the circulation.