What happened to the American economy after World War I? The economy grew slowly. The economy declined. The economy grew quickly. The economy stayed the same.

It was going good then everyone dumped alot into stocks using speculations they used so many they couldnt get there money back which led to the deppresion

The correct answer is The economy grew quickly

After world war 1, the United States had one of the strongest economies in the world and entered the period of the roaring twenties where everything was prospering. Due to this, people believed that this would never end and started investing in stocks which led to the downfall of US during the great depression.