Question

What major breakthrough enabled Johannes Gutenberg's printing press to mass-produce printed material?

a. Metal type
b. Wooden press
c. Glass ink
d. Stone paper

Answer 1

The major breakthrough that enabled Johannes Gutenberg's printing press to mass-produce printed material was **a. Metal type**. Gutenberg's innovation involved the use of movable metal type, which allowed for the efficient setting of text and mass production of printed materials.