The union had helped a lot in this case. They take important decision to make the world free from wars. They together the countries.
The Kansas-Nebrask Act was an 1854 bill that mandated “popular sovereignty”–allowing settlers of a territory to decide whether slavery would be allowed within a new state's borders. ... Kansas was admitted as a free state in January 1861 only weeks after eight Southern states seceded from the union.Oct 29, 2009
The correct answer is B. Printed books were more available and more affordable.
Explanation:
Gutenberg's press was a device and method created to facilitate the printing of documents. This differed from other devices and methods because it made the creation of documents faster, cheaper, and more efficient. This innovation caused many more books could be printed and these were affordable. Moreover, the creation of this device occurred in the 1400s, which was during the beginning of the Renaissance period. This made it possible during this period there were more books including copies of important books and people could access them, which facilitated the spread of knowledge and ideas. According to this, the correct answer is B.