A nurse is assessing a client who has a concussion from a sports injury. Which of the following manifestations should the nurse expect?

A. Loss of consciousness may occur with concussion, but "translucent dreaming" is not a recognized symptom. B. The Glasgow Coma Scale (GCS) score ranges from 3 to 15; a score of 20 is not possible. C. Nuchal rigidity is a sign of meningeal irritation, not typically seen with concussion. D. Sensitivity to touch (allodynia) or light sensitivity (photophobia) can occur after a concussion as part of the post-concussive symptoms.