When Assessing an Adult After a Fall, the Nurse in the Emergency

When assessing an adult after a fall, the nurse in the Emergency Department notes a dilated pupil on the right and a haematoma in the right temporal area. What does this most likely mean?

A) The process affecting the pupil is localised on the right side (ipsilateral pupil dilation) .
B) The process affecting the pupil is occurring on the opposite side and is unrelated to the right temporal hematoma.
C) The process affecting the right pupil is temporary and soon both pupils will be equal in size.
D) The process causing the right pupil to dilate is a result of brainstem injury.