Why Was the U

Why was the U.S. Treasury's decision to issue greenbacks a profoundly important development for the U.S. economy?

A) It was the first time U.S. currency was backed by precious metals.
B) It caused runaway inflation for the first time in American history.
C) It was the first time U.S. currency could not be exchanged for gold or silver and instead relied on public trust in the government.
D) It entirely eliminated the need for any government taxation during the war.
E) It subordinated the U.S. dollar to the British pound for the duration of the nineteenth century.