The correct option is C 405
As a reference, Homo sapiens (modern humans) have a cranial capacity of at least 1400 cc. Chimpanzees have a brain size between 300 and 500 cc, with an average of 400 cc. Gorillas have an average brain size of 500 cc, with large individuals going up to 700 cc, or even 752 cc in one reported instance. Thus, the correct answer is option C.