Which two infrastructural gains underpinned the division of labour between an industrial 'core' and a commodity-producing 'periphery' that first emerged in the nineteenth century?

Question

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The development of railways and steamships in the nineteenth century facilitated the efficient transportation of goods and raw materials, enabling the industrial 'core' to process commodities from the 'periphery' and distribute finished products globally.

Which Two Infrastructural Gains Underpinned the Division of Labour Between