Final answer:
The factors that either caused or resulted from the stock market crash and the ensuing Great Depression include increased buying of stocks on credit and a marked decline in the construction industry, while the fallout from the "court-packing" scheme, income-tax cuts, and Roosevelt's Keynesian policies were not immediate causes or results.
Step-by-step explanation:
Several factors either caused or were immediate results of the stock market crash and the ensuing Great Depression. The increased buying of stocks on credit is one such factor, as excessive use of margin to buy shares led to inflated stock prices and eventually to a market bubble. A marked decline in the construction industry is also identified as a contributing factor, as it indicated a slowdown in economic activity. On the other hand, the fallout from the "court-packing" scheme (which is more related to Franklin D. Roosevelt's presidency in 1937 and the political landscape rather than the stock market crash or the onset of the depression), income-tax cuts (generally seen as a stimulative measure rather than a cause of a downturn), and Roosevelt's implementation of the principles of Keynesian economics (which is a response to the depression rather than a cause) were not immediate causes or results of the stock market crash.
The primary reasons for the collapse of the stock market include international economic woes, poor income distribution, a speculative bubble fueled by buying on margin, and the psychology of public confidence leading to a panic once the market began to fall. These factors interconnectedly contributed to the overall economic decline.