Each country decides what currency they will use. This is why each currency has a different currency rather than all of them using the same one. This is also why exchange rates exist, as each country's currency is valued based on the strength of that country's economy.
D. He was a doctor who probed the workings of the conscious and unconscious mind. He's the one associated with terms such as "penis envy," and the interpretation of dreams in such a way that the dreamer has some sort of sexual attraction to someone or something.
The earliest large cities in colonial North America were located on the northeastern coast. These cities include Boston, New York City and Philadelphia.