Answer:
D. Germany had to pay reparations
Explanation:
After WW1 Germany was heavily in debt after it was forced to pay reparations for it's involvement in the war.
A voilent protest, threats towards a school or a threat to a federal ran business such as a post office some banks police station etc.
William McKinley was the president in the year 1900
Answer:He was on Air Foece One
Hope this helps