A nurse is assessing a client's cranial nerves as part of a neurological examination. Which action should the nurse take to assess cranial nerve III?

A. Observing for facial symmetry assesses cranial nerves VII (facial nerve) rather than cranial nerve III. B. Checking the pupillary response to light assesses cranial nerve III (oculomotor nerve), which controls pupil constriction and extraocular eye movements. C. Testing visual acuity assesses cranial nerve II (optic nerve), not cranial nerve III. D. Eliciting the gag reflex assesses cranial nerves IX (glossopharyngeal) and X (vagus), not cranial nerve III.