If Blood Transports Hormones Throughout the Body,how Do They Communicate

Multiple Choice

If blood transports hormones throughout the body,how do they communicate with specific targets?

A) Special gateway valves in the blood vessels direct hormones to their target tissues.
B) Special carrier proteins "walk" along microtubule tracts to deliver the hormones to their targets.
C) Axonal pathfinding mediates the delivery of hormones to their specific targets.
D) Only target tissues have receptors that allow them to receive the signal.