<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 13-year-old girl is brought to the physician because of worsening fever, headache, photophobia, and nausea for 2 days. One week ago, she returned from summer camp. She has received all age-appropriate immunizations. Her temperature is 39.1C 102.3F. She is oriented to person, place, and time. Physical examination shows a maculopapular rash. There is rigidity of the neck; forced flexion of the neck results in involuntary flexion of the knees and hips. Cerebrospinal fluid studies show:Opening pressure 120 mm H2OAppearance ClearProtein 47 mgdLGlucose 68 mgdLWhite cell count 280mm3Segmented neutrophils 15Lymphocytes 85Which of the following is the most likely causal organism?? A: Echovirus, B: Listeria monocytogenes, C: Herpes simplex virus, D: Streptococcus pneumoniae, E: Neisseria meningitidis,  <response>: This is a question about identifying the most likely causal organism of meningitis in a 13-year-old girl. The key findings in the stem are: - Worsening fever, headache, photophobia, nausea for 2 days- Recently returned from summer camp - Maculopapular rash- Neck rigidity, positive Kernigs sign- CSF findings showing lymphocytic pleocytosis, normal glucose, elevated proteinBased on the clinical presentation and CSF findings, this is most consistent with viral meningitis. The lymphocytic pleocytosis and normal CSF glucose narrow the differential to a viral cause. The recent summer camp exposure also raises suspicion for an enterovirus like echovirus. Of the choices given, echovirus is the most likely causal organism.A: Echovirus 