Final answer:
The true statement regarding group differences in IQ scores is that they can be influenced by both genetics and environment. Scientific studies, such as those involving twins, point to a genetic component, while also acknowledging the significant impact of environmental factors such as socioeconomic status and educational resources.
Step-by-step explanation:
True Group Differences in IQ Scores
When considering what is true regarding group differences in IQ scores, the scientific consensus suggests that IQ scores can be influenced by both genetics and environment. This consensus acknowledges that while there may be a genetic component to intelligence, as suggested by twin studies such as the Minnesota Study of Twins Reared Apart, environmental factors also play a crucial role. For instance, socioeconomic status and the availability of educational resources can impact cognitive development and test performance. In addition, the early environment's richness in stimuli has been found to benefit intelligence levels of individuals. It's crucial to note that attributing intelligence differences solely to genetics was challenged as it does not account for the influence of environment, nor does it consider potential biases in testing or social and cultural factors.
Therefore, the correct answer to the question is:
c) Group differences in IQ scores can be influenced by both genetics and environment.