Place the processes occurring in the digestive tract in the correct order. I Peristaltic waves of contraction propel the food along the esophagus.
II Gastric juices are secreted with the arrival of food into the duodenum.
III The acidic chyme is transferred through the pyloric sphincter.
IV HCl and pepsin begin digestion of proteins into shorter polypeptides.

A- I, II, and IV
B- IV, III, and II
C- I, II, and III
D- I, IV, and III
E- II, III, and IV