Study of the function of the living human brain is difficult for all the following reasons,EXCEPT
A ) it is unethical to induce brain damage in humans for the purpose of research.
B ) brain damage is rarely the same from case to case.
C ) it is difficult to obtain the brain of a person who has suffered brain damage.
D ) researchers have to wait for the natural death of a brain-damaged human to verify the location of the brain damage.
E ) a damaged brain gives us little information about brain structure and function in the living brain.