Hi , John Phillip Sousa invented the sousaphone.
The Tenth Amendment was added to the Constitution of 1787 largely because of the intellectual influence and personal persistence of the Anti-Federalists and their allies. It's quite clear that the Tenth Amendment was written to emphasize the limited nature of the powers delegated to the federal government.
C. Fur trading because they used to use the skins of animals such as beavers
I believe it was The Gospel of Wealth.