According to Piaget,determining that the length of the string is the solution to the pendulum problem,and being able to provide a rationale,are hallmarks of hypothetical-deductive reasoning,which is indicative of the ____ stage of cognitive development.

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Hypothetical-deductive reasoning is a hallmark of the formal operations stage of cognitive development according to Piaget's theory. This stage typically begins around age 12 and is characterized by the ability to think abstractly, reason logically, and engage in hypothetical and deductive reasoning, which is necessary to solve complex problems. In contrast, the sensorimotor stage (A) is characterized by the development of basic sensory and motor skills, while the preoperational stage (B) is marked by the emergence of symbolic thought and the use of language. The concrete operations stage (C) is characterized by the ability to think logically about objects and events in the physical world but not yet able to engage in hypothetical reasoning.

According to Piaget,determining That the Length of the String Is