Multiple choice Which of these was NOT a cause of the Great Depression? the Stock Market Crash of October, 1929 an increase in federal taxes and social programs excessive stock speculation and "buying on margin" the growing gap between the rich and the working class Reveal answer Fill a bubble to check yourself B Correct answer Explanation The Great Depression was caused by factors like the stock market crash, over-speculation, and income inequality. Increasing federal taxes and social programs were actually part of the New Deal response to the Depression, not a cause of it.