How Does the Highly Acidic Fluid in the Stomach Become

How does the highly acidic fluid in the stomach become slightly basic almost immediately upon entry into the small intestine?

A) The acids in this fluid are neutralized by the amylase secreted from the pancreas.
B) The acids in this fluid are neutralized by the sodium bicarbonate secreted from the pancreas.
C) The acids in this fluid remain in the stomach and only the partially digested food enters the small intestine.
D) The acids are absorbed by the small intestine as soon as they leave the stomach.