What was the main reason why the great depression was felt so financially in europe, even before the actual stock market crash of 1929?

a) the financial cost of building up the military to defeat hitler.
b) too many nations were spending and investing money in the united states.
c) the financial cost of world war i left many nations with no money and high unemployment.
d) too many industries moved to the united states after world war i and never returned to europe.

i would go with the last one

when a country suffers, for example, a drought period, the market product is affected for a low offer, in this case, potatoes; the government has to tax to the households, which have to give more money for the potatoes which they consume, that situation make them consume substitute goods even through loans, it could increase the financial market movement and the inflationary phenomena, the business has to increase salaries in order to the employees could buy a more expensive food (potatoes) and in order to inflation tha business had to buy expensive supplies in the factor market, while the rest of the world have to gain more money to consume the same amount of potatoes.