A 36-year-old man presents with difficulty reading for 1 day. Examination reveals a left centrocecal scotoma. Peripheral vision is relatively spared, as is vision in the right eye. He also is noted to...

A 36-year-old man presents with difficulty reading for 1 day. Examination reveals a left centrocecal scotoma. Peripheral vision is relatively spared, as is vision in the right eye. He also is noted to have brisk reflexes and a positive Babinski sign on the left. Where is the lesion?

A. Midbrain on the left, involving the oculomotor nerve and corticospinal tract

B. Left optic nerve and right cervical spinal cord

C. Left optic nerve and left cervical spinal cord

D. Left optic nerve and left pons

E. Optic chiasm and right internal capsule