Regarding the Comparison of Identical Twins Reared Together and Apart

Regarding the comparison of identical twins reared together and apart, which of the following statements is FALSE?

A) The IQs of some separated twins differ by as much as 20 points when the twins grow up with large educational and environmental differences.
B) Being placed in homes socially and educationally similar to their biological parents tends to inflate apparent genetic effects by making separated twins' IQs more alike.
C) The similarity of IQ of identical twins reared apart is inflated by the fact that identical twins develop in the same prenatal environment.
D) Psychologists who emphasize genetics believe that the correlations between identical twins show that adult intelligence is roughly 80 percent hereditary.