Her blood analysis shows increased neutrophils. Her urinalysis is positive for organisms and leukocytes. What is the drug of choice for this condition?

A 4 year old girl is brought to the clinic by her mother complaining of fever and abdominal pain since yesterday. Today, she looks uncomfortable during micturition. On examination, her temperature is 99.4, her pulse is 100/min. and her suprapubic area is soft and tender. Her blood analysis shows increased neutrophils. Her urinalysis is positive for organisms and leukocytes.
What is the drug of choice for this condition?

A- Ciprofloxacin
B- Chloramphenicol
C- C0-trimoxazole
D- Rifampin