question: Q:A 55-year-old man presents to his primary care physician for knee pain. The patient has had left knee pain, which has been steadily worsening for the past year. He states that ice and rest has led to minor improvement in his symptoms. He recently bumped his knee; however, he says that it has not altered his baseline pain when ambulating. The patient is a butcher and lives with his wife. His current medications include insulin, metformin, hydrochlorothiazide, and lisinopril. He is attending Alcoholics Anonymous with little success. Physical exam reveals a left knee that is mildly erythematous with some bruising. There is no pain upon palpation of the join or with passive range of motion. The patient exhibits a mildly antalgic gait. Which of the following is the best initial step in management?? 
  {'A': 'Aspirin', 'B': 'Colchicine', 'C': 'MRI', 'D': 'Rest for 1-2 weeks', 'E': 'Weight loss'},