Great depression , economy paper

Please provide a comprehensive answer to the following two questions:

1) Which were the main causes of the Great Depression?

2) Why did the Great Depression last so long?

Indications:

To answer these questions, please start with our textbook information and then use at least one more reputable source for your research. 
Please use the bibliographic information recommended by the Modern Language Association (MLA). 
Length: at least six pages, including bibliography. 
For each question: write the question as a title and then provide your answers.

preview of the answer..

The Great Depression, the worst economic depression in the history of United States lasted between 1929 and 1939. This depression was brought about by a combination of factors which led to immense suffering of Americans. One of the factors believed to have led to this depression was the stock market crash of 1929. The crash took place on Black Tuesday, October ..

APA 670 words