A Researcher Is Interested in Discovering If One Part of the Brain,the

A researcher is interested in discovering if one part of the brain,the orbitofrontal cortex,has connections with another part of the brain,the amygdala.Which of the following experimental methods would be the most appropriate for this purpose?

A) Inject horseradish peroxidase into a rat's orbitofrontal cortex and then see if cells in the amygdala are stained.
B) Inject a human volunteer with a radioactive glucose and see what part of his brain is active while viewing an emotionally charged set of pictures using a PET scan.
C) Look at a human brain with fMRI to see if the orbitofrontal cortex and amygdala are active at the same times.
D) Stimulate the orbitofrontal cortex of a human volunteer during neurosurgery.