The fact that the correlation in IQ scores between identical twins reared apart is lower than that between identical twins reared together suggests that

A) environmental factors can have an influence on intellectual development.
B) environmental factors have no impact on intellectual development.
C) genetic factors have no impact on intellectual development.
D) identical twins often do not have the same genotype.

Correlation

A statistical measure that describes the extent to which two variables change together, but does not necessarily imply causation.

IQ Scores

Numerical measurements derived from standardized tests designed to assess human intelligence and cognitive abilities.

Identical Twins

Twins that develop from a single fertilized egg, sharing 100% of their DNA, and typically having very similar physical traits and characteristics.