Answer:
Because the blockade affected US economies.
Explanation:
During the world War I, European countries conducted naval blockade that was intended to prevent their oppositions from receiving supplies and sold their product overseas.
At that time, USA was a neutral country that did not wanted to be involved in the war. But, the blockade still affected the traders from United States.
The blockade by the Britain army caused a lot of Damage to Germany. in retaliation, Germany started to ordered their submarines to shoot the ships that pass across the northern Sea. They intended to shoot British' ships, but a lot of American ships were caught in the crossfire. This caused the people of United States pushed the government to join the allied Forces during the war to fight off Germany.
D. Powers shared between the Federal and State governments.
Concurrent powers are the powers that are shared by the Federal government with the States.
The most important of these is the power to tax. Both the federal and state governments have the ability to tax.
Answer is D.
Germany out of those 4 countries had the most dramatic territorial changes during that time period.
Assuming you're still referring to the Fifteenth Amendment, many critics pointed out that the newly-freed slaves lacked the proper amount of education to make informed voting decisions, and that it would be detrimental to the state to have them vote in general and local elections.