Answer:
C. millions of Americans, many of them had never owned stocks.
Step-by-step explanation:
During the stock market crash of 1929, also known as "Black Tuesday," which marked the beginning of the Great Depression, the effects were widespread and not limited to only those who had heavily invested in stocks or wealthy industrialists. Option C is the correct choice as it accurately reflects that millions of Americans were impacted by the stock market crash, even if they had never owned stocks before. The crash had far-reaching consequences on the overall economy, including widespread unemployment, loss of savings, business failures, and a decline in consumer spending, which affected people from various socioeconomic backgrounds, not just stock brokers and banks.