Research Has Shown That in the Cortexes of Opossums Blinded

Research has shown that in the cortexes of opossums blinded at birth:

A) Area X,which exists in sighted opossums,was not present.
B) the visual area was smaller than normal,while the other sensory areas were of normal size.
C) within the visual area,some neurons responded to auditory or somatosensory stimuli.
D) there were no multimodal neurons.