Read the Following Health Record Information: "Hospital Course: on Arrival

Read the following health record information: "Hospital Course: On arrival to the ED, Susan was alert and oriented, but she looked a little pale and tired. She was treated with IVF for dehydration and given antipyretics for her fever. Within an hour, she had improved some, but given her inability to tolerate PO, the pediatric on-call physician recommended that she be admitted. She was admitted for a UTI and treated with IV antibiotics; a urine culture was sent. On hospital day 2, her fever had improved, and she was looking better. Unfortunately, on hospital day 3, Susan's fever returned, and she looked acutely ill." According to the health record information, what was the patient's admitting diagnosis?

A) urinary tract infection
B) fever
C) inability to take anything by mouth
D) lethargy
E) dehydration