How Does ADH Work and What Does It Do

How does ADH work and what does it do?

A) It binds to water molecules, making them too large to diffuse out of the blood stream, retaining water when the body needs it.
B) It binds to blood cells, making them more porous to water so it more easily diffuses back into them and is not lost in urine filtration.
C) It binds to the kidney tubules, making them less porous to water so less water filters out.
D) It binds to nerve cells in hypothalamus, signaling that the body is dehydrated and should retain water.
E) It binds to the collecting tubules in the kidney, opening pores to allow water to flow back out of the kidney into the blood.