If Differences in Heredity Were Unimportant for Differences in IQ

Multiple Choice

If differences in heredity were unimportant for differences in IQ scores,what should we expect?

A) IQ correlations should be equally high for monozygotic and dizygotic twins.
B) IQ correlations should be higher for dizygotic than monozygotic twins.
C) IQ correlations should be higher for monozygotic than dizygotic twins.
D) IQ correlations should be higher for twins reared apart than reared together.