Because the printing press was not invented until later, so before that all books had to be copied by hand. It was very time-consuming and required a lot of skill.
The answer is B (Regional Lords).
Hope this helps :)
Lincoln. Abraham Lincoln.
They're known as Indo- Europeans.
Indo-Europeans is a general name for the people speaking an Indo-European language. They are (linguistic) descendants of the people of the Yamnaya culture in Ukraine and southern Russia, and settled in the area from Western Europe to India.
They raised cattle and horses. They were the first ones to domesticate horses, which increased their ability to travel and migrate