The printing press made the price of books... A - more expensive.

B- cheaper.

C-stay the same.

D-less accessible to commoners.

(B) Cheaper

Explanation: Books were written by hand, which made them rare and expensive. The invention of the printing press, using movable type, by Johannes Gutenberg in 1440 made books cheaper to produce, encouraging writing and the sharing of knowledge.

if i knew what was the answer i wouldve put it

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.