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According to "From barter to bitcoin" witch statement about the bitcoin is true
A, its value can change dramatically.
B, it was introduced in the 1940's.
c, it is a farm of fiat money, whose value is backed by the U.S. government
D, it exists online as a digital currency and in the real world as a metal coin

Sagot :

Answer:

It exists online as a digital currency and in the real world as a metal coin.

Explanation:

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