I would say b. precious stones Example of commodities that have been used as mediums of exchange include gold, silver, copper, salt, peppercorns, tea, large stones (such as Rai stones), decorated belts, shells, alcohol, cigarettes, cannabis, candy, cocoa beans, cowries and barley.
Believe it might be D) The believed in social contract theory
The industrial revolution began in Great Britain as it had most coal and iron which enabled it to build factories and machines. It spread from Britain towards Europe, where it mostly developed in Germany and it also spread into the US.
They had successfully organized workers into unions.
