Answer:
Stock market crash of 1929, also called the Great Crash, a sharp decline in U.S. stock market values in 1929 that contributed to the Great Depression of the 1930s. The Great Depression lasted approximately 10 years and affected both industrialized and nonindustrialized countries in many parts of the world.
The stock market crash triggered the beginning of the Great Depression the worst economic crisis in U.S history, factor that didn't contributed to crash was "too many ordinary people owing stocks"
What was Great Depression?
The Great Depression was the worst economic downturn in the history of the industrialized world, lasting from 1929 to 1939. It began after the stock market crash of October 1929, which sent Wall Street into a panic and wiped out millions of investors.
The day of stock market crash known as Black Thursday, the crash was preceded by a period of phenomenal growth and speculative expansion. A glut of supply and dissipating demand helped lead to the economic downturn as producers could no longer readily sell their products.
Hence, option B is correct
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