It would be primarily "The Church and the Crusades" that <span>played a significant role in uniting the kings and people of Europe, since adhering to religious principles back then was the norm for most. </span>
<span>It showed that the Union's 3-way plan might succeed.</span>
C. Hopefully that is correct.
The correct option is: "Rapid industrialization"
The twentieth century was characterized by advances in technology, medicine and science; the end of slavery in the so-called underdeveloped countries; the liberation of women in most of the Western countries; but more than anything because of the growing development of the industry, converting several countries, including the United States, into world powers.
