During the First World War, the US became the largest supplier of food, manufactures and weapons to Europe. In this context, at the end of the war there was a relationship of dependence, where the US needed the market of Europe to dispose of its great production, and war-torn Europe depended on the American supply.
However, the European economy was devastated while the US was at its peak and created an overproduction that did not find enough consumer market, causing the economic crisis that would become the great depression.
John promised to pay Bill if he painted the garage by Friday but John called him to cancel the deal before he began to do the task and he didn't even buy the supplies. So, John won't be obligated to pay Bill $100 if he buys the supplies and paints John's garage because John let him know that the deal was off before he had bought anything. According to that, the statement is false.