Which of the Following Is a Characteristic of a Stop-Loss

Which of the following is a characteristic of a stop-loss order?

A) The stop-loss order is the quickest way to have an order filled.
B) The stop-loss order allows buy orders to be filled at the lowest price.
C) The stop-loss order allows stocks to be purchased at the current market price.
D) The stop-loss order sells a stock when the market price drops below a specified price.
E) The stop-loss order is used to buy stocks at a 10% margin.