Which Statement About the Digestive System Is True

Which statement about the digestive system is true?

A) Salivation and swallowing are conscious reflexes.
B) The passage of food through the gut occurs without nervous system involvement.
C) Arrival of food in the stomach stimulates the colon, which may lead to defecation.
D) The CNS processes neural messages from one region of the gut before sending them to another region of the gut.
E) Digestion is controlled only by hormones and not by nerves.