Which one of the following statements best reflects Sternberg's triarchic theory of intelligence?
a. Intelligent behavior is a function of how well people draw on their prior experiences and cognitively process information in order to adapt to their particular environmental situation.
b. Intelligent behavior evolves in three stages: preoperational thought, concrete thought and abstract thought.
c. To be truly intelligent, one must show competence in critical thinking and appropriate classroom behavior, as well as in traditional academic tasks.
d. Intelligence is due to heredity, environment, and a complex interaction between the two; ultimately, researchers will probably never be able to separate the relative effects of heredity and environment.