The nurse understands that which of the following interventions is the MOST effective at relieving pain and discomfort during a bone marrow aspiration and biopsy for a school-aged child?

A. While lidocaine cream can provide some pain relief, it is not the most effective method for relieving pain during a bone marrow aspiration and biopsy. B. Relaxation techniques can help with anxiety but are not sufficient alone to relieve pain during this procedure. C. Conscious or unconscious sedation is the most effective intervention to relieve pain and discomfort during a bone marrow aspiration and biopsy. This method ensures that the child is adequately sedated and comfortable throughout the procedure. D. Acetaminophen can help with minor pain but is not effective enough for the pain associated with a bone marrow aspiration and biopsy.