Answer: C
Step-by-step explanation:
D is a silly answer, so you can eliminate that right off. A seems reasonable, but technology wasn't advanced yet so there were no drawbacks when there was nothing to draw back from. B is just as good as C, but C is the correct answer because the Great Depression inspired people to get out of poverty and numerous slumps, and so the American population wanted to succeed with jobs and different aspects of life.
Take a look at the book The Great Gatsby. It's a Depression classic in literature, and there's a theme of flaunting wealth in every part. The "flaunting wealth" part connects with the will to succeed.