Which retail innovation first made religious texts widely affordable to the average person in the 15th century?

Throughout history, religious texts have undergone fascinating transformations in their packaging, distribution, and retail presence. From ancient scrolls to mass-produced books to digital platforms, the way spiritual wisdom reaches believers has evolved dramatically. This poll tests your knowledge about a significant retail innovation that changed how people access religious texts in the modern era.

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Gutenberg's printing press, which reduced Bible production costs by approximately 90%
The creation of monastic scriptoria, where monks mass-produced handwritten texts
The development of paper as a cheaper alternative to parchment and vellum
The establishment of cathedral libraries that offered public reading sessions