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

A. Position the child sitting with their buttocks at the edge of the table: This position is not appropriate for bone marrow aspiration. It does not provide adequate access to the iliac crest, which is the common site for bone marrow collection in children. B. Position the child side-lying to expose the vertebrae: The vertebrae are not typically used for bone marrow aspiration. The iliac crest (the top of the hip bone) is the preferred site, and side-lying does not expose this area appropriately for the procedure. C. Place the child supine with legs flexed outward into a frog-like position: This position is commonly used for procedures such as abdominal or pelvic examinations but does not provide the best access for bone marrow aspiration from the iliac crest. D. Place the child in prone position to expose the posterior iliac crest: The prone position with the back exposed allows the posterior iliac crest to be properly accessed for bone marrow aspiration. This is the correct position for the procedure in children.