A 28-year-old woman presents with bloody diarrhea, tenesmus, and crampy abdominal pain for 3 weeks. Colonoscopy shows continuous mucosal inflammation from the rectum to the splenic flexure. Which feature best distinguishes this condition from Crohn disease?
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A
Presence of granulomas on biopsy
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B
Involvement of the terminal ileum
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C
Continuous colonic involvement starting at the rectum
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D
Transmural inflammation