A 40-year-old woman presents with brief severe headaches over the right eye. They occur several times per day and are associated with runny nose, sweating, and reddening of the eye. What structure is...

A 40-year-old woman presents with brief severe headaches over the right eye. They occur several times per day and are associated with runny nose, sweating, and reddening of the eye. What structure is involved?

A. Maxillary sinus

B. Ophthalmic nerve