Economic choices made by consumers and investors during the 1920s contributed to the stock market crash and ultimately the Great Depression. One such action included buying stocks on margin. This meant

A.
investors bought a stock for a fraction of the cost and borrowed the rest against potential future stock earnings.
B.
brokers matched potential investors with other potential investors looking to pool their money to dominate the market.
C.
investors bought stocks for an extremely low price and turned them around for a huge profit.
D.
brokers tricked young, new investors into purchasing stocks for a much lower value than their worth.

A. investors bought a stock for a fraction of the cost and borrowed the rest against potential future stock earnings.