In one study, investigators monitored activity levels in a brain area (the fusiform face area, or FFA) that seems particularly responsive to pictures of faces, and also in another area (the parahippocampal place area, or PPA) that seems particularly responsive to pictures of places. Their data showed that
a. the activity of these areas could be predicted based simply on what stimulus was in front of the person's eyes.
b. if a picture of a face was put in front of one eye and a picture of a place in front of the other, both brain areas became highly activated.
c. brain activity in these two regions depended on what the person was consciously perceiving and not just what the stimulus was.
d. high levels of activation were detected in the FFA even when pictures of houses were shown, illustrating the flexibility of brain function.
Answer: C