A 23-year-old woman presents with dysuria and left flank pain. She is 27 weeks pregnant. Physical examination reveals a temperature of 38°C (100.4°F); there is tenderness with percussion over the left costovertebral angle. Urinalysis shows 15 to 20 WBC's/hpf and 15 to 20 bacteria/hpf. What is the most appropriate management
a. bactrim as an outpatient
b. keflex as an outpatient
c. unasyn as inpatient
