Answer:
B. Inventing the printing press
Step-by-step explanation:
Johannes Gutenberg was a German blacksmith, goldsmith, inventor, printer, and publisher who invented the first printing press. The first working printing press was revealed around 1450 in Strasbourg. Before this invention, books were written by hand, which meant that there weren't many examples and that they weren't affordable. The invention of the printing press meant that the production of books became easier and that they became more affordable. Thanks to this, books and literature gained popularity.