The transcontinental railroad. Because of it, goods were able to be exchanged between the west and east and Chinese immigrants mainly worked on it.
This answer to this would be A.
Buying on margin is borrowing money from a broker to purchase stock. You can think of it as a loan from your brokerage. Margin trading allows you to buy more stock than you'd be able to normally. To trade on margin, you need a margin account. ... Regrettably, marginable securities in the account are collateral.
What is the role of Government?
establish Justice, insure domestic Tranquility, provide for the common defense, promote the general Welfare, monitor the economy, businesses, and banks; maintaining the education system, roads, and public utilities, regulating the safety of food and medicine