One of the early concerns of IQ tests was that they tested the subject's knowledge of the upper-class white culture of the scientists who developed them, and not the true educational potential of the person tested. In view of this, which assessment of the early IQ tests is most accurate?

A. The early IQ tests lacked reliability.
B. The early IQ tests were based on a faulty hypothesis.
C. The early IQ tests lacked validity.
D. The early IQ tests were improperly administered.