Developmental researchers have proposed that an additional stage may follow Piaget's traditional four stages, that explains adults' ability to think in ways that are more practical, flexible and dialectical. This stage is called

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.

world bank is the correct answer.

well its not not rising unemployment and falling inflation.

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