Source 1: Excerpt from The stock market crash of October 1929 led directly to the Great Depression in Europe. When stocks plummeted on the New York Stock Exchange, the world noticed immediately. Although financial leaders in England, as in the United States, vastly underestimated the extent of the crisis that would ensue, it soon became clear that the world's economies were more interconnected then ever. The effects of the disruption to the global system of financing, trade, and production and the subsequent meltdown of the American economy were soon felt throughout Europe.

A)According to Source 1, the Wall Street Crash of ‘29 proved to the world that
The United States was the cause of all problems

B)The American economy’s meltdown only impacted the United States

C)Europe’s economies were connected

D)The world’s economies were all connected to each other