In the following lesions, the liver dullness boundary can be enlarged A: Flatulence of gastrointestinal tract B: Acute severe hepatitis C: Liver abscess D: Advanced cirrhosis E: Right pulmonary fibrosis

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