The response that correctly examines how the aftermath of World War I created economic ties between the United States and Europe, which ultimately made the Great Depression a global problem, is:
After the destruction of World War I, the U.S. government lent money to European countries that needed to rebuild.
This statement highlights the significant financial connections established between the U.S. and Europe post-WWI, as American loans and investments were crucial for European reconstruction, which in turn made the economic downturn during the Great Depression affect both continents.