Which innovation most significantly revolutionized the supply chain of religious texts in 15th century Europe, making scriptures widely accessible to the general population?

Religious texts are some of the most widely distributed products in human history, with complex supply chains spanning millennia. From hand-copied manuscripts to mass-produced modern editions, the journey of sacred texts involves intricate logistics, preservation techniques, and distribution networks. This poll tests your knowledge of how religious texts move from creation to the hands of practitioners around the world.

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Gutenberg's movable type printing press
The development of paper manufacturing from wood pulp
The establishment of monastic copying centers
The creation of merchant guilds specializing in book trade