Which of the following is a recommended treatment of choice for outpatient treatment of pelvic inflammatory disease?
a. Ceftriaxone + ciprofloxacin + metronidazole
b. Ceftriaxone + ampicillin + metronidazole
c. Cefotaxime + doxycycline + metronidazole
d. Cefexime + doxycycline + metronidazole
e. Ceftriaxone + doxycycline + metronidazole