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.