One of the reasons why stock bought on margin is considered a risky investment is because "Investors purchased the stocks with little cash down," meaning that they had to borrow the remained of the money.
C, D, and E were the main 3 reasons the colonists had.
The term SPA above refers to the three well-known Philosophers and they are Socrates, Plato, and Aristotle. And according to these Philosophers, what they did in attempting to understand humans was only by observing them. How they understood human behavior is by observing how humans behave given different circumstances and their attitudes toward these. Hope this helps.
