A 22-year-old Hispanic male is brought to the emergency department following a motor vehicle accident in which he was an unrestrained passenger. He is conscious on exam, and complains of double...

A 22-year-old Hispanic male is brought to the emergency department following a motor vehicle accident in which he was an unrestrained passenger. He is conscious on exam, and complains of double vision. A quick exam reveals a dilated right pupil and impaired ocular movement. What has caused his symptoms?

 A. Herniation of the brain stem through the foramen magnum

 B. Herniation of the ipsilateral side of the temporal lobe through the tentorium

 C. Herniation of the lower medial aspect of the hemisphere under the falx cerebri

 D. None of the above