A nurse is instructing a nursing student on performing pupillary checks on a patient with a possible head injury. Which statement indicates that the nursing student understands the concept?

"When I shine a light into the patient's eyes, the pupils should constrict."

"It is normal for the pupils to react sluggishly to light."

"When I shine a light into the patient's eyes, the pupils should dilate

"Pupil checks should be performed with the room lights on."