A 36-year-old previously healthy outpatient with lobar pneumonia on CXR, CURB-65 = 0, no comorbidities, and no MRSA/Pseudomonas risk. Which empiric oral regimen is guideline-concordant?AHigh-dose amoxicillin 1,000 mg three times dailyBAzithromycin 500 mg on day 1 then 250 mg daily (local macrolide resistance >25%)CLevofloxacin 750 mg dailyDAmoxicillin-clavulanate 875/125 mg twice daily + doxycycline 100 mg twice dailyECefdinir 300 mg twice dailyCheck my answer