The Great Depression led to _____.

Structural economic reforms
The world adopting the gold-standard
Vast employment of American citizens
The stock market crash

All of the above options are correct.

The Great Depression led to:

1. The stock market crash: The Great Depression began with the stock market crash of October 1929, also known as "Black Tuesday." This event marked the beginning of a severe economic downturn in the United States and eventually worldwide.

2. Vast unemployment of American citizens: The Great Depression resulted in widespread unemployment as businesses struggled to survive and implement cost-cutting measures. Many people lost their jobs, and unemployment rates reached as high as 25% in the United States.

3. Structural economic reforms: The Great Depression led to significant structural economic reforms in various countries, including the United States. Governments implemented policies to regulate banks, financial markets, and other sectors of the economy in an attempt to stabilize and revive economic growth.

4. The world adopting the gold standard: The Great Depression did not lead to the world adopting the gold standard. In fact, the gold standard was abandoned by various countries during the Great Depression as they faced difficulties maintaining fixed exchange rates and gold reserves in the midst of economic turmoil.

Overall, the Great Depression was a period of significant economic hardship, characterized by the stock market crash, high unemployment rates, and the implementation of structural economic reforms by governments around the world.