If a Scientist Were to Examine an FMRI and See

If a scientist were to examine an fMRI and see that the mirror neurons were active,what would she be unable to distinguish in that person's mental processes?

A) whether the person was looking in a mirror or at a photo of him or herself
B) whether they were looking at a mirror image or true copy of a photograph
C) whether the person was using their left or right eye to view a face
D) whether the person was feeling sadness or seeing someone else experience sadness