Which Statement About Antidiuretic Hormone (ADH) Is True

Which statement about antidiuretic hormone (ADH) is true?

A) ADH reduces water conservation in the kidneys.
B) When levels of salt increase in the blood, the posterior pituitary secretes less ADH.
C) ADH relaxes peripheral blood vessels.
D) When levels of ADH are high, the kidneys produce large amounts of very dilute urine.
E) In response to low blood pressure, the posterior pituitary secretes more ADH.