Answer:
Germany wanted to open a front in the Americas. With the "distraction" of Mexico attacking, it may lead to US cutting off supplies and troops that would have gone to the Western Front to fight to defend their own homeland. As the Allies were heavily dependent on US products & material, this shortage of supply would lead to a weakened front, easing the front for the Germans to take advantage of.
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Explanation:
the population decreased dramatically
people lost their jobs
Not 100% sure, but I think its D.
Answer:
the Influenza Pandemic
Explanation:
it started in 1918 and killed 50 million and ended in 1920
The answer is B. Constantly poluted
