Which of the following is an example of a negative feedback mechanism in regards to hormone regulation?

A)ADH is released from the pituitary causing water to be reabsorbed in the kidneys.
B)A baby suckles in order to stimulate milk production.
C)The uterine contractions during labor stimulate oxytocin production.
D)All of these are examples of a negative feedback mechanism.
E)None of these are examples of a negative feedback mechanism.