Which innovative product launch technique first made the Bible widely accessible to the general public in Europe?

Throughout history, religious texts have employed unique 'launch strategies' to spread their message. From ancient scrolls to modern digital platforms, the distribution of spiritual wisdom has evolved dramatically. This poll tests your knowledge about one of the most significant religious text publication events in history that revolutionized accessibility to sacred writings and changed religious practice forever.

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

Gutenberg's printing press mass production in the 1450s
The Vatican's illuminated manuscript distribution program of 1390
Luther's door-to-door Bible delivery campaign of 1517
The Medici family's subscription-based scripture service of 1475