A 45-year-old treatment-naïve patient with dyspepsia tests positive for H. pylori. No prior antibiotics; no susceptibility testing available; no penicillin allergy. What is the preferred empiric eradication regimen?APPI + clarithromycin + amoxicillin for 14 daysBLevofloxacin triple therapy for 10 daysCOptimized bismuth quadruple therapy for 14 daysDRifabutin triple therapy as first-lineEHigh-dose PPI + amoxicillin dual therapy for 7 daysCheck my answer