A 50-year-old woman presents to you with the complaints of muscle pain

A 50-year-old woman presents to you with the complaints of muscle pain accompanied by stiffness in her shoulders, neck and hips for the past several months. She also complains of difficulty in rising from a seated position and combing her hair she has had fatigue and occasional fever episodes for the past month.On physical examination she has normal muscle strength, tenderness on muscle and limited range of motion of the neck, shoulders, and hips. There is no evidence of giant cell (temporal) arteritis in the history or physical examination. Laboratory work reveals a hemoglobin of 9 g/dL on a complete blood count. Further laboratory results are still pending. Which of the following results would be expected in the work-up of this patient’s presenting condition?

A Increased erythrocyte sedimentation rate and normal serum creatinine kinase

B Normal ESR and normal serum creatinine kinase

C Normal ESR and increased serum creatinine kinase

D Increased serum C-reactive protein and normal ESR

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yes I have, but please tell how to approach to diagnosis