Lucas Wants to Sell 9,000 Shares of Stock and Places

Lucas wants to sell 9,000 shares of stock and places a market order. The floor broker is unable to arrange the sale with another floor broker so the specialist agrees to "stop" the stock. What has the specialist agreed to do?

A) cancel the order
B) place the order into the order book to hold until an order to buy 9,000 shares is received
C) purchase the shares if no other buyer is readily available
D) sell the shares to the next available buyer regardless of the price received
E) sell the shares at the end of the trading day at the best price available at that time