A 33-year-old man presents with dyspepsia; noninvasive testing confirms H. pylori infection. No prior therapy or known susceptibility testing. Which regimen is preferred?AClarithromycin triple therapy (PPI + clarithromycin + amoxicillin) ×10 dBBismuth quadruple therapy (PPI + bismuth + tetracycline + metronidazole) ×14 dCSequential therapy with amoxicillin then clarithromycin-basedDDoxycycline-based quadruple therapy ×10 dELevofloxacin triple therapy first-lineCheck my answer