The correct answer is:
A. After the destruction of World War I the US government lent money to European countries that needed to rebuild.
This answer accurately reflects how the United States provided financial assistance to European nations in the aftermath of World War I, which created economic ties. The loans and investments made by the US facilitated economic recovery in Europe but also tied the economies of the US and Europe together. When the Great Depression hit, the interconnectedness of these economies contributed to the global nature of the economic crisis.