Final answer:
Current diagnoses of intellectual disability highlight the importance of both genetic and environmental factors in shaping an individual's intelligence, supporting the idea that genetics determine potential while environment influences the realization of that potential.
Step-by-step explanation:
Most current diagnoses of intellectual disability emphasize on c. A combination of genetic and environmental factors. Evidence suggests that intelligence is influenced by both genetic predispositions and environmental stimulation. Genetics can set the limits of one's intellectual potential, but environmental factors are crucial in determining whether individuals reach that potential. The concept of Range of Reaction supports this viewpoint, highlighting that environmental experiences, especially in childhood, play a significant role in intellectual development. Additionally, studies have found that highly gifted individuals often come from diverse backgrounds but those with supportive environments usually report higher levels of happiness and success.