The nurse is assessing a 12 year old with new onset of double vision. The nurse notes the child's right eye is positioned down and out. The nurse knows these findings are suggestive of damage to cranial nerve

A. II: The optic nerve (cranial nerve II) is responsible for vision, including visual acuity and the afferent limb of the pupillary reflex. Damage to this nerve causes vision loss or visual field defects but does not affect eye movement or positioning. B. VI: The abducens nerve (cranial nerve VI) innervates the lateral rectus muscle, which abducts the eye. Damage to this nerve results in an inability to move the eye laterally, leading to horizontal diplopia, but it does not cause a "down and out" eye position. C. III: The oculomotor nerve (cranial nerve III) controls most of the extraocular muscles, including the superior, inferior, and medial rectus muscles, as well as the inferior oblique. It also controls the levator palpebrae superioris and the parasympathetic fibers responsible for pupillary constriction. Damage to cranial nerve III results in ptosis, a "down and out" eye position due to unopposed action of the lateral rectus (cranial nerve VI) and superior oblique (cranial nerve IV), and potentially a dilated pupil. D. IV: The trochlear nerve (cranial nerve IV) innervates the superior oblique muscle, which depresses and internally rotates the eye. Damage to this nerve typically causes vertical diplopia and difficulty looking downward, especially when reading or descending stairs, but it does not cause a "down and out" eye position at rest.