Antidiuretic Hormone (ADH) Is Produced by the Pituitary Gland When

Antidiuretic hormone (ADH) is produced by the pituitary gland when the brain detects lower-than-optimum levels of water in the body. In the kidneys, ADH promotes the uptake of water, creating more concentrated urine. ADH travels from the pituitary gland to the kidneys through the

A) nervous system.
B) circulatory system.
C) endocrine system.
D) digestive system.