____________ is also called regional enteritis. It is subacute, chronic inflammation extending throughout all layers of the intestinal mucosa. May have periods of remission and exacerbation. Diagnostic procedure includes ___________.
a) Ulcerative Colitis; Colonoscopy
b) Crohn's Disease; Upper endoscopy
c) Appendicitis; CT scan
d) Irritable Bowel Syndrome; Barium enema