Which trade theory contends that a country that initially develops and exports a new product may eventually become an importer of it and may no longer manufacture the product ?

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Which trade theory contends that a country that initially develops and exports a new product may eventually become an importer of it and may no longer manufacture the product ?

A. Theory of factor endowments
B. Theory of overlapg demands
C. Economies of scale theory
D. Product life cycle theory