True, if this is about WW1 the germans rapidly moved through Belgium ignoring thier neutrality in the conflict.
A) A fort was established and many were killed by diseases
Lewis and Clark's expedition was not positive to the native of Mandan village the most devastating epidemic was the smallpox outbreak in the year 1837 killing a lot of people. The epidemic played an important factor in uniting the surviving Mandans and Hidatsa who later engaged in trade, farming and hunting.
They have different culture , like ... Foods + Tradition and more .
I think that it is c. because it makes the most sense.
The election I see friendly nations around the world pointing fingers at our once great country and once noble leadership. I see a president who is deliberately undermining the election. I see a ruined Republican Party, exchanging love of country for position and power, displaying rank hypocrisy over the Supreme Court.