In the Context of Buying and Selling Securities, Placing a Sell

In the context of buying and selling securities, placing a sell limit order:

A) prevents your broker from buying low and selling high over a relatively short time horizon.
B) prevents your broker from selling your stock at a price you believe is too low.
C) instructs your broker to sell your stock at the current market price.
D) instructs your broker to sell your stock just before it becomes undervalued in the market.