Question

Studies in which Inhelder and Piaget's classic tasks are administered to people of a variety of ages and backgrounds indicate that formal operational reasoning is found consistently across several of the classic tasks after age 15-16 (10th grade) is found among the majority of adults but not teenagers is found mainly in areas where a person has developed considerable expertise is found only among highly trained scientists and philosophers

Answer 1

Studies in which Inhelder and Piaget's classic tasks are administered to people of a variety of ages and backgrounds indicate that formal operational reasoning is found consistently across several of the classic tasks after age 15-16 (10th grade). So, the first option is correct.