A 55-year-old man is diagnosed with a duodenal ulcer. A CLO test performed during endoscopy is positive for Helicobacter pylori. He is not allergic to penicillin. What is the recommended first-line eradication therapy according to NICE guidelines?AOmeprazole, amoxicillin, and clarithromycin for 7 daysBOmeprazole, amoxicillin, and metronidazole for 7 daysCBismuth subcitrate, metronidazole, tetracycline, and omeprazole for 7 daysDAmoxicillin and metronidazole for 14 daysEOmeprazole and clarithromycin for 7 daysCheck my answer