Which Statement About Movement of Food in the Vertebrate Gut

Multiple Choice

Which statement about movement of food in the vertebrate gut is false?

A) Three sphincters are found in the vertebrate gut.
B) Peristalsis can move food in both directions.
C) The gut contains both longitudinal and circular muscles.
D) The primary function of peristalsis is mixing food in the stomach.
E) The muscle in a sphincter is normally contracted.