<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 47-year-old woman comes to the physician because of body aches for the past 9 months. She also has stiffness of the shoulders and knees that is worse in the morning and tingling in the upper extremities. Examination shows marked tenderness over the posterior neck, bilateral mid trapezius, and medial aspect of the left knee. A complete blood count and erythrocyte sedimentation rate are within the reference ranges. Which of the following is the most likely diagnosis?? A: Polymyositis, B: Major depressive disorder, C: Fibromyalgia, D: Systemic lupus erythematosus, E: Rheumatoid arthritis,  <response>: This is a clinical case question involving a 47-year-old woman with chronic body aches, morning stiffness, and tingling in her arms. The key findings on exam are tenderness over the posterior neck, trapezius muscles, and left knee. Lab tests are normal. The chronicity of symptoms over 9 months along with the distribution of tender points makes fibromyalgia the most likely diagnosis. Polymyositis would cause muscle weakness. Depression does not explain the physical exam findings. Lupus and rheumatoid arthritis could cause these symptoms but would be associated with abnormal inflammatory markers.C: Fibromyalgia 