Regarding the Performance of Various Ethnic Groups on IQ Tests

Regarding the performance of various ethnic groups on IQ tests, which of the following statements is FALSE?

A) As a group, African Americans are more likely than European Americans to live in environments that are physically, educationally, and intellectually impoverished.
B) The assumptions, biases, and content of standard IQ tests do not always allow meaningful comparisons between ethnic, cultural, or racial groups.
C) The ethnic background of the test creator has not been shown to affect the test performance of test takers, whether their ethnicity was the same or was different from the test creator.
D) One study found that placing poor African-American children into European-American adoptive families increased the children's IQs by an average of 13 points.