Answer:
The correct answer is A.
Explanation:
The fault in the early IQ tests was their unreliability. It is because of the fact that they used it for higher upper class white culture. The IQ factor varies greatly among different individuals regardless of their race and culture except some theories on genetical intelligence transfer. There is not only one one type of intelligence, it can be musical, spatial and art etc, So the methods that are utilized early were highly unreliable