Experiments with different magnification lenses showed that germs were real and could be observed. He also started vaccination and pasteurization.
B, commander of the faithful
D is the answer I just reasearched
Answer:
After the treaty of Versailles, the Austro Hungarian Empire was divided into The Republic of Austria, the Kingdom of Hungary, Czechoslovakia, the Free State of Fiume and the State of Slovenes, Croats and Serbs (Yugoslavia).
Explanation:
These problems mostly included the issue of racim which was a very problematic issue in the 19th and the 20th century. Not only this, another issue were the rights of women and worker rights in the US.