Which publishing innovation, introduced in the 1450s, most dramatically expanded the market for Bibles and is credited with helping spark the Protestant Reformation?

The publishing and distribution of religious texts represents one of history's oldest product markets. Throughout centuries, technological innovations have transformed how sacred writings reach believers. From handwritten scrolls to mass-printed books to digital platforms, these changes have dramatically impacted religious practice and accessibility. This poll explores a pivotal moment in the history of religious text distribution that revolutionized market reach.

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Gutenberg's movable type printing press
The introduction of paper manufacturing in Europe
The standardization of Latin Vulgate translation
The development of leather-bound codex binding techniques