A 28-year-old at 38 weeks gestation, with no history of penicillin allergy, has unknown Group B Streptococcus (GBS) status and presents in labor with rupture of membranes. What intrapartum antibiotic prophylaxis is recommended?AAmpicillin 1 g IV every 4 hoursBVancomycin 1 g IV every 12 hoursCClindamycin 900 mg IV every 8 hours (no susceptibility data)DPenicillin G 5 million units IV loading, then 2.5-3.0 million units IV every 4 hours until deliveryECefazolin 500 mg IV every 8 hoursCheck my answer