Causes of the Wall Street Crash were the collapse of the
stock market due to the drop in prices that people started selling their stocks
and this led to closures of banks many invested in stocks. The impact was that many business were closed
down and many people lost their jobs.
World War 1 began after the assassination of Archduke Ferdinand, the heir to the Austro-Hungary empire in 1914. Serbia was still under their rule and killed the heir for independence. Serbia formed an alliance with Russia, and Austro Hungary formed an alliance with France and great Britain. Which caused other countries to "pick a side" belguim sided with serbia and germany sided with Austro-Hungary. The war caused Europe to fall in power
hope this helps
I believe that the answer is D.
