Which One of the Following Statements Is Correct Concerning Market

Which one of the following statements is correct concerning market efficiency?

A) Real asset markets are more efficient than financial markets.
B) If a market is efficient,arbitrage opportunities should be common.
C) In an efficient market,some market participants will have an advantage over others.
D) A firm will generally receive a fair price when it sells shares.
E) New information will gradually be reflected in a stock's price to avoid any sudden change in the price of the stock.