Problem: After assessing the client and identifying the need for headache relief, the nurse administers acetaminophen (Tylenol) for the client's headache. What is the nurse's next priority action for this client? A. Revise the plan of care, B. Eliminate acute pain from the nursing care plan, C. Reassess the client's pain level in 30 minutes, D. Direct the unregulated care provider to ask if the client's headache is relieved?