during a research study, delphine is asked to view a series of pictures. the experimenter also tells her that she will later be asked to categorize the pictures she has seen. what region of delphine's brain is less likely to be active than another study participant who was not told about the grouping task? please choose the correct answer from the following choices, and then select the submit answer button. the medulla the prefrontal cortex the parietal cortex the hippocampus