Which printing innovation is credited with making the Bible widely accessible to the general public for the first time in the 1450s?

Throughout history, religious texts have been among the most important publications in human civilization. The methods of producing and distributing these sacred works have evolved dramatically over time, with certain innovations transforming access to spiritual knowledge. This trivia question focuses on a pivotal moment in religious publishing that democratized access to sacred texts across Western society.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Gutenberg's movable type printing press
The Aldine Press's pocket-sized octavo format
Illuminated manuscript mass production techniques
Caxton's double-column folio printing method