I think you forgot to give the choices along with the question. i am answering the question based on my knowledge and research. <span>The person most known for contributing to the final form of the constitution was James Madison. I hope that this is the answer that has actually come to your desired help.</span>
Answer:
C: President of the United States
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.