Final answer:
Christianity's spread was significantly aided by Gutenberg's invention of the printing press with moveable type, which allowed for the mass production of religious texts and other literature, catalyzing the Protestant Reformation and the Renaissance.
Step-by-step explanation:
Christianity did indeed spread more rapidly during the Renaissance, and a significant factor in this dissemination was the invention of a printing press that used moveable type by Johannes Gutenberg.
Before this invention, books were hand-copied and not readily available to the general public. Gutenberg's press, first used to print around 180 copies of the Bible in 1455, allowed knowledge to be mass-produced and more widely distributed. This innovation fostered the spread of new ideas and facilitated the Protestant Reformation, as reformers like Martin Luther could distribute their works more efficiently to a broader audience. The spread of printing technology not only supported the diffusion of religious texts but also classical Greek and Roman texts, contributing to the humanist movement and a culture of skepticism towards established religious authority. The printing press was a pivotal development that led to the Renaissance and, ultimately, the Age of Enlightenment.