The Stock Market Crash of 1929 was caused by a combination of several factors. The five most relevant causes from your list are:
A. Americans purchased stocks on margin.
B. Americans over speculated the stock market.
D. Overproduction created an imbalance between supply and demand.
E. High tariffs discouraged international trade.
H. The Federal Reserve failed to prevent the collapse of the banking system.
These factors together contributed to the economic instability and lack of confidence that led to the crash.