Answer:
C. the initial diffusion of Buddhism and Christianity to East Asia
Explanation:
Unlike many other empire in that era, The Mongols were extremely tolerant toward religion. They did not force the people that they conquered to follow a certain religion.
The initial diffusion of Buddhism and Christianity occurred because of difference in language.
Not many priests from western nations understand the language used in Asian countries to be able to spread the Christian teaching. Buddhism on the other hand was taught widely in their local language.
I want to say it is D, because I believe it was in Harpers Ferry where the fight occurred and he lost his (I believe) 5 sons and his own life afterwards.
That's because they were preparing for the biggest war in human history. This was the policy of militarism where building up a military was necessary to ensure that the people could fight against others. The number of soldiers in European armies increased twice in size in only 20 years between the 1890s and 1910s.