Regarding Ethnic Groups and IQs, Which of the Following Statements

Regarding ethnic groups and IQs, which of the following statements is FALSE?

A) As a group, Japanese-American children score above average in IQ.
B) Historically, African-American children in the United States scored an average of about 15 points lower on standardized IQ tests than European-American children, although this gap has been reduced by one-third since 1972.
C) One study found that placing poor African-American children into European-American adoptive families increased the children's IQs an average of 13 points.
D) Most psychologists have concluded there is significant scientific evidence that group differences in average IQ are based on genetic differences.