The use of standarized metal coins
The correct answer is letter C.
Explanation: The printing press was created around 1448 by Johann Gutenberg. It made the ideas be spread in all Europe.
In that time Martin Luther spread his ideas about the Protestant Reformation, and had a small number of people to listen to him. But the printed word could spread hid idea for so much more of people.
An this helps Martin Luther and eliminated the Catholic Church's control of everything.
That black people (not just slaves) had no rights in america and their fore couldn't even bring a law suit.
Your answer is A. i hope this hel<span>ped!!</span>