When performing an otoscope examination for a 2-year-old child, which of the following techniques is correct?

A. Tilting the head forward is not necessary for the otoscope exam. B. Pulling the pinna up and back is used for older children and adults. C. Releasing the pinna after inserting the speculum is unnecessary. D. For young children under 3 years, the pinna should be pulled down and back to straighten the ear canal.