The Modern Era spanned at this time. Hope this helps.
The answer is: E. It became a military superpower in the world but lacked a strong economy.
During the 20th century, United states more than 20% of its GDP to be allocated into millitary spending, which make us able to become a millitary superpower and contribute greatly to the victories during the world war I.
There is a downside to this. Large allocation to millitary budget means that there would be less that can be allocated to build things such as infrastructures, loans, government sponsored jobs, etc. Which is why the economy of united states at that era was a little bit lacking.
Florida took a lot of time becoming a state due to the fact that it faced the same dilemma as Missouri as it entered into the Union. They had to wait for a certain period of time to ensure that the balance between Free State and slave remains unbroken. They became a state when Iowa was admitted into the Union which was a free state which maintained the balance.
The two groups that fought each other in World War I became known as the Triple Alliance (the main forces were Germany, Austria-Hungary, the Ottoman Empire and Italy) and the Triple Entente (the main forces were Russia, Great Britain and France)
