Using Positron Emission Tomography,researchers Have Compared the Activity Levels in the Left

Using positron emission tomography,researchers have compared the activity levels in the left and right hemispheres of manic-depressive brains and schizophrenic brains and found that activity is

A) low in the left hemisphere for both manic-depressives and schizophrenics.
B) low in the right hemisphere for both manic-depressives and schizophrenics.
C) low in the left hemisphere for manic-depressives and low in the right hemisphere for schizophrenics.
D) low in the right hemisphere for manic-depressives and low in the left hemisphere for schizophrenics.