Which statement about the pyloric sphincter is true?


A. When the pyloric sphincter opens, partially digested food is pushed from the esophagus into the stomach.

B. When the pyloric sphincter opens, partially digested food is pushed from the stomach to the large intestine.

C. When the pyloric sphincter closes, partially digested food is prevented from entering the large intestine.

D. When the pyloric sphincter closes, partially digested food is prevented from entering the small intestine.