I think that the answer is d. the harshness of the invasions deterred people from following the religion of the invaders.
The Federalist Papers were a series of eighty-five essays urging the citizens of New York to ratify the new United States Constitution. Written by Alexander Hamilton,James Madison<span>, and </span>John Jay<span>, the essays originally appeared anonymously in New York newspapers in 1787 and 1788 under the pen name "Publius."</span>
Christianity ends up being the most popular and it influenced politics etc