Answer:
Buying on margin.
Explanation:
It is factor leading to the stock market crash on Black Tuesday. Buying on margin meant that people did not pay the full price of stocks. They just paid a percentage and borrowed the money to pay for the rest of the price. In the 1920s this was a common practice based on optimism, on the belief of constant growth of the stock prices in that decade. As the stock prices kept going up, it was hoped the debt would be paid in this way. So, stock prices were overvalued and they fell precipitously when the financial bubble burst.
A, the colonists had no direct representation in Parliament. One of the oft-cited quotes of the time is "No taxation without representation"
In order to answer this, you must have a clear understanding of the difference between a primary source and a secondary source. A primary source is one that has been written in the time period being studied. A secondary source analyzes key points, often based off of primary sources.
Knowing these definitions, we can conclude that the correct answer is (c)<span> an academic analysis of key battlefield strategies. An academic analysis will provide insight on the topic being studied (in this case battlefield strategies), however it is typically not written with a direct connection to the time.</span>