Buying on margin was a method of buying stocks

  Buying on margin was a method of buying stocks with mostly borrowed money. The stock market crash caused the Great Depression. One cause of the Great Depression was that, in response to workers' demands, wages rose faster than corporate earnings, causing factories to go bankrupt.

i think it's a)sparta

there are many ways of getting involved on your local party. attached you will find the brochure that describes some ideas: go ahead and visit your local hq, become a volunteer on your comnunity or struggle up for your own ideas so you can make them real.