The<br/>following descriptions,which is right() A: Nematodes<br/>have complete alimentary canal B: Trematodes<br/>have complete alimentary canal C: Cestodes<br/>have complete alimentary canal D: Cestodes<br/>have body cavity

Flatulence and eructation represent ________. A: regurgitation of chyme B: distention of the esophagus C: passage of gas or air from the GI tract D: muscular movement of the alimentary tract E: sounds heard only by abdominal auscultation