<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 47-year-old man presents to the clinic with a 10-day history of a sore throat and fever. He has a past medical history significant for ulcerative colitis and chronic lower back pain. He smokes at least 1 pack of cigarettes daily for 10 years. The father of the patient died of colon cancer at the age of 50. He takes sulfasalazine and naproxen. The temperature is 38.9C 102.0F, the blood pressure is 13187 mm Hg, the pulse is 74min, and the respiratory rate is 16min. On physical examination, the patient appears tired and ill. His pharynx is erythematous with exudate along the tonsillar crypts. The strep test comes back positive. In addition to treating the bacterial infection, what else would you recommend for the patient at this time?? A: Fecal occult blood testing, B: Flexible sigmoidoscopy, C: Low-dose CT, D: Colonoscopy, E: PSA and digital rectal exam,  <response>: This is a patient with strep throat who has multiple risk factors for colon cancer - a family history of colon cancer in a first degree relative before age 60, a 10 pack year smoking history, and a personal history of ulcerative colitis. The patient is 47 years old. The recommended screening for colon cancer in average risk individuals begins at age 45. However, this patient has multiple risk factors that make colon cancer screening indicated at this visit. Fecal occult blood testing and flexible sigmoidoscopy are suboptimal screening tests compared to colonoscopy in patients with increased risk for colon cancer. PSA and digital rectal exam screen for prostate cancer and are not indicated in this patient at this time. Low-dose CT scans are used to screen for lung cancer in smokers and are not useful for colon cancer screening. Colonoscopy is the recommended screening test for colon cancer in increased risk patients like this one.D: Colonoscopy 