A 19-year-old woman attending school in Massachusetts presents with the chief complaint of bloody…

A 19-year-old woman attending school in Massachusetts presents with the chief complaint of bloody diarrhea for 2 months. She has abdominal discomfort and feels she has lost some weight. She also complains of tenesmus. Abdominal examination is normal. Rectal examination reveals stool containing blood and pus. Which of the following is the most likely diagnosis? a. Irritable bowel syndrome b. Ulcerative colitis c. Giardiasis d. Hemorrhoids e. Diverticulosis