A 35-year-old woman presents with a 24-hour history of fever, right flank pain, vomiting, dysuria, and hematuria. A urinalysis reveals large numbers of red and white blood cells, as well as leukocyte esterase, and a subsequent urine culture was positive for >100,000 Escherichia coli. The patient denies having a history of renal calculi, and a bedside renal ultrasound does not show any stones or hydronephrosis bilaterally. She is diagnosed with a right-sided pyelonephritis and admitted for pain control, hydration, and IV antibiotic therapy. Her symptoms, including her fever, abate quickly, and she is discharged after 48 hours of being afebrile.

Which prescription would she most likely receive upon discharge?
a. Oral antibiotics such as ciprofloxacin or levofloxacin for 7-10 days
b. Oral antibiotics such as trimethoprim-sulfamethoxazole or nitrofurantoin for 7-10 days
c. Oral antibiotics such as amoxicillin-clavulanate or cefalexin for 7-10 days
d. IV antibiotics continued for a few more days, followed by a switch to oral antibiotics for a total treatment duration of 10-14 days