What Is the Cephalic Phase of Digestion

What is the cephalic phase of digestion?

A) The earliest phase of digestion in which the brain prepares the body in anticipation of food.
B) The phase in which semi-digested food leaves the stomach and slowly enters the small intestine.
C) The phase in which the majority of absorption occurs,primarily in the small intestine.
D) The final phase of digestion in which the large intestine and rectum prepare the undigested components of food for elimination.