Which significant advancement in printing technology did Johannes Gutenberg introduce?

Johannes Gutenberg is credited with the introduction of the printing press in the mid-15th century, which revolutionized the production of books and the dissemination of information. The significance of this advancement lies in its ability to produce texts in large quantities, making reading material more accessible to the general public and thus facilitating mass-market reading.

Prior to Gutenberg's invention, books were laboriously hand-copied, making them expensive and rare. The printing press allowed for the rapid and cost-effective reproduction of texts, leading to an increase in literacy rates and the spread of ideas. This was foundational in shaping public discourse and culture, as it democratized knowledge and information.

The other options relate to important historical developments but do not directly stem from Gutenberg’s contributions in printing technology. Regular timekeeping relates to advancements in mechanical clocks, gasoline-driven vehicles pertain to the industrial revolution and transportation technology, and the Reformation of Christianity, while significantly impacted by printed materials, was a broader movement influenced by many factors beyond Gutenberg's invention. Thus, recognizing Gutenberg's role in facilitating mass-market reading highlights the transformative power of his technological innovation.