A 66-year-old man presents complaining of vision problems manifesting as double vision when he looks to the left. This has been going on for several hours. On exam, he fails to adduct the right eye on...

A 66-year-old man presents complaining of vision problems manifesting as double vision when he looks to the left. This has been going on for several hours. On exam, he fails to adduct the right eye on left lateral gaze. On right lateral gaze, his eyes do not cross the midline. His reading ability is relatively spared. What structures are involved?

A. Left sixth nerve nucleus and right PPRF

B. Right sixth nerve nucleus and left MLF

C. Left sixth nerve nucleus and left MLF

D. Right sixth nerve nucleus and right MLF

E. Right sixth nerve nucleus and left PPRF