The correct options are
B There was political instability in Germany.
C The Treaty of Versailles was severe on Germany.
Germany printed money to pay the debts imposed by the Treaty of Versailles. More money in circulation increased the prices of the products sold. Suppliers increased the prices of products during high demand. This process is called inflation. It went so high in Germany that people carried money in carts to buy a loaf of bread. Thus, Germany witnessed hyperinflation not deflation.