Select the letter of the correct answer.
Which is most important to include in a summary of this Article?
A. The development of Gutenberg's movable-type printing
press gave Copernicus access to printed copies of
planetary movements.
B. The Scientific Revolution boosted the profits of some
print-shop owners who provided books for universities.
C. The Scientific Revolution led to the organization of
scientists called the Royal Society of London.
D. The development of Gutenberg's movable-type printing
press helped to initiate a dramatic shift in scientific study.
