The heritability of intelligence is lowest among genetically

A) similar individuals who have been raised in similar environments.
B) dissimilar individuals who have been raised in similar environments.
C) similar individuals who have been raised in dissimilar environments.
D) dissimilar individuals who have been raised in dissimilar environments.

The heritability of intelligence refers to the degree to which variation in intelligence can be attributed to genetic factors. The lowest heritability of intelligence is found among similar individuals who have been raised in dissimilar environments because environmental factors can have a significant impact on intelligence. When individuals are raised in dissimilar environments, their experiences can vary widely and this can affect their intelligence, making it more difficult to attribute differences in intelligence solely to genetics. In contrast, when individuals are raised in similar environments, environmental factors are thought to be more controlled and differences in intelligence are therefore more likely to be attributed to genetic factors.