A. Unrestricted Submarine Warfare.
This caused Germans to attack vessels that carried US citizens, bringing the US into the war.
Zero times that the word slavery appears in the constitution.
Answer:
In the United States, a national bank is a commercial bank. The comptroller of the currency of the U.S. Treasury will charter a national bank. ... Internationally, "national bank" is synonymous with "central bank," or a bank controlled by the national government of a country
The US has a market economy.