Which product design innovation first allowed religious texts to be accessed non-sequentially with rapid navigation between sections?

Throughout history, religious texts have undergone fascinating evolutions in their design and production. From ancient scrolls to modern digital formats, the presentation and accessibility of sacred writings represent some of the most significant product innovations in human history. This poll tests your knowledge about a revolutionary design innovation that transformed how religious texts were accessed and studied across multiple faith traditions.

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The codex format (bound pages) that replaced scrolls around the 1st century CE
The addition of chapter and verse numbering systems in the 13th century
The invention of the printing press by Johannes Gutenberg in the 15th century
The implementation of cross-referencing systems in the 16th century