The stock market crash of 1929 was a direct result of A. a belief in the strength of the economy B. a lack of confidence in the economy C. a surge of growth in the economy D. an underproduction of goods in the economy

A-a belief in the strength of the economy

although all of these are very vague answers this one makes the most sense because it crashed because everyone thought they had enough money and bought too much stuff they didn't need.