In a few sentences describe what a stop$-$loss order is and when and why you would use one.

Barbara is talking to Eva about the Efficient Market Hypothesis $($EMH$).$ Barbara asks Eva:

"What is one implication of the EMH?" How should Eva reply from the choices below to give

Barbara a correct answer?

Security prices are determined randomly

Investors can never earn superior returns

Few investors should expect that they can beat the market consistently

Taking on additional risk means you should expect lower returns