I believe the answer is D) Tuberculosis - Hope it helps! If It is wrong, Im truly sorry. :D
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Answer:
The Lumière brothers' most important contribution
Explanation:
The Lumière brothers' most important contribution to the development of the movies was their introduction of narrative, aided by editing. daguerreotype. A movie that can be described in one line is a concept film.
It was a trigger that showed that there were two competing powers in Europe: Russia and Austria-Hungary (and their allies).
Franz Ferdinand was killed by a Serbian separatist and the Austrians wanted him to be punished. On the other hand, Russia supported Serbia is saying that Austrian demands ( to be allowed to search for the culprit inside Serbia) were too much.
This lead to a direct conflict between the two powers (Austria and Russia) and further lead to the war.
There was no way to contain the diseases no vaccines poor treatment no knowledge of what it was not a strong immune system
The answer should be A. Great Depression.