A nurse is assisting with the collection of a bone marrow specimen from a preschooler.Which of the following actions should the nurse take?

Choice A rationaleSide-lying positioning exposes vertebrae, but bone marrow aspiration in preschoolers typically utilizes the iliac crest as the access site due to its accessibility and relative safety in young children.Choice B rationaleThe prone position facilitates access to the posterior iliac crest for bone marrow aspiration, ensuring optimal anatomical exposure and stability during the procedure.Choice C rationaleSupine frog-leg positioning exposes femoral access points but is less preferred due to anatomical challenges and procedural limitations associated with this site in preschool-aged children.Choice D rationaleSitting at the edge of the table is not conducive to bone marrow aspiration as it compromises procedural stability and does not grant optimal exposure to the iliac crest or vertebrae.