The nurse is observing another nurse administer blood. Which of the following indicates to the observing nurse that the administering nurse does not understand blood administration? A. Run the blood slowly for the first 15 minutes at 20 drops per minute. B Establish the required flow rate after 15 minutes if no signs of a reaction. C Infuse the transfusion slowly over 6 hours. D Assess the vital signs every 30 minutes until one hour post-transfusion