<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A previously healthy 24-year-old woman comes to the physician because of a 1-day history of nausea and weakness. She is sexually active with 2 male partners and uses an oral contraceptive; she uses condoms inconsistently. Her last menstrual period was 4 days ago. Her temperature is 38.4C 101F. Physical examination shows right costovertebral angle tenderness. Pelvic examination is normal. Which of the following is the most likely cause of this patients condition?? A: Ascending bacteria from the endocervix, B: Noninfectious inflammation of the bladder, C: Ascending bacteria from the bladder, D: Decreased urinary pH, E: Decreased renal calcium reabsorption,  <response>: This is a clinical case scenario involving a 24-year-old woman with nausea, weakness, fever, and costovertebral angle tenderness. The key findings are:1 Sexually active with multiple partners and inconsistent condom use - raises suspicion for STD2 Recent menstrual period 3 Fever 4 Costovertebral angle tenderness - suggests kidneyureter involvement5 Normal pelvic examBased on the sexual history, fever, and unilateral back pain, this sounds most consistent with an ascending urinary tract infection like pyelonephritis. The normal pelvic exam makes cervicitisendometritis less likely. The choices involving decreased urinary pH and decreased calcium reabsorption do not fit with the clinical presentation.C: Ascending bacteria from the bladder 