A nurse in the community clinic is providing care to a client who is anxious and hyperventilating. What should the nurse do to reduce the risk of respiratory alkalosis?

A. Having the client place a plastic bag over their head is dangerous and should never be done. B. Teaching breathing techniques, such as diaphragmatic breathing or using a paper bag, helps the client retain more carbon dioxide and can prevent respiratory alkalosis. C. Positioning the client in a high-Fowler position may be helpful for breathing but does not address hyperventilation or respiratory alkalosis directly. D. While encouraging the client to remain calm may help, it is not as effective as teaching specific breathing techniques.