A nurse is caring for a school-age child who is 2 hr postoperative following a cardiac catheterization. The nurse observes blood on the child's dressing. Which of the following actions should the nurse take?

A. Applying pressure below the site will not effectively stop the bleeding. B. Intermittent pressure is not appropriate; continuous pressure is required to stop active bleeding. C. Applying pressure below the site will not effectively stop the bleeding. D. Applying continuous pressure above the catheterization site helps occlude the artery and stop bleeding.