Nursing 101 Question - Experienced Nurses, how would you answer this?

I would absolutely not have picked C. I mean just because there's a worsening of pain, it could mean anything! If it was oral PO meds, then they may not have kicked in. The pt could have moved the arm and of course it hurts. Unless I saw compromised circulation, edema, cyanosis, I would not call for a cast cutter and an emergency MD. The lecturer is basing her answer on information that isn't there and I was always taught that's a no-no. Keep it simple. I would have elevated and iced first unless of course I saw compromise.