Irritable Bowel Syndrome Is

Irritable bowel syndrome is:

A) an erosion in the wall of the stomach, duodenum, or any other part of the GI tract exposed to gastric juice.
B) a lack of the enzyme lactase in the small intestine, producing symptoms of gas production when dairy foods are consumed.
C) a chronic disease characterized by periodic disturbances of diarrhea and constipation without clear physical damage.
D) a syndrome affecting the intestines characterized by a wide range of symptoms and conditions, ranging from diarrhea to ulcerative colitis and Crohn disease.