The answer is C.personal income tax
The alliances system meant that a local conflict could easily result into an intimidating global one. The overall cause of World War was the assassination of Archduke Franz Ferdinand. Nationalism was a great cause of World War one because of countries being greedy and not negotiating.
Your welcome I don't know if that helped. But yea.
Lowering tariffs to increase the foreign competition on low prices. creating the federal reserve for economic stability and accessible credit for the middle class
