What statement is true regarding the movement of the extraocular muscles?

Ocular motility is coordinated by the cranial nerves that innervate the six extraocular muscles. The oculomotor nerve (III) controls the majority of movements, while the trochlear (IV) and abducens (VI) nerves manage specific rotational and lateral vectors. Functional synchrony of these nerves is essential for binocular fusion and tracking. Impairment results in strabismus or diplopia. A. There is decreased extraocular muscle movement in the elderly: While some geriatric patients may exhibit a slight decrease in the smoothness of pursuit or limited upward gaze, extraocular movement remains largely intact in healthy aging. Significant decreases in movement are usually pathological, indicating neurological or muscular disease rather than normal aging. B. It is stimulated by cranial nerves I and II: Cranial nerve I is the olfactory nerve (smell), and cranial nerve II is the optic nerve (vision/sensory). Neither of these nerves possesses motor fibers. They are responsible for sensory input and do not stimulate the muscles that move the eye. C. Extraocular muscles are impaired in patients with cataracts: Cataracts involve the opacification of the crystalline lens, which impairs vision by scattering light. This is an intraocular structural issue and does not affect the neuromuscular function of the extraocular muscles or the nerves that control eye movement. D. It is stimulated by cranial nerves III, IV, and VI: This is the correct anatomical fact. Cranial nerve III (oculomotor) stimulates the superior, inferior, and medial rectus, and inferior oblique. Nerve IV (trochlear) stimulates the superior oblique, and nerve VI (abducens) stimulates the lateral rectus muscle.