Which One of the Following Statements Is Correct Concerning Market

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

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