What Were the Findings of the FMRI Study of Singer

What were the findings of the fMRI study of Singer et al. (2006) concerning empathy for pain?

A) Doctors were able to switch off the tendency to activate pain-related regions when watching someone else in pain.
B) Participants activated pain-related regions of the brain when watching someone else receive a shock irrespective of whether the other person had treated them fairly.
C) Participants activated pain-related regions of the brain when watching someone else receive a shock, but the degree of activation was modulated by whether the other person had treated them fairly.
D) Autistic people did not activate pain-related regions of the brain when watching someone else receive a shock.