A Stop-Loss Order (Or a Sell Stop Order)

A stop-loss order (or a sell stop order) :

A) becomes a market order as soon as a trade takes place at this price,which is higher than the current market price
B) is a limit sell order above the current market price
C) is a sell order placed at the ongoing current ask price
D) is a sell order placed at a price lower than the current bid price
E) None of these answers are correct.