When I _______ the farm, the children had finished _______ the apple. [ ]

A. reached; picking

B. got; picking

C. came; picked

D. arrived in; to pick

某投资者在3月份以5美元/盎司的权利金买入1份执行价格为800美元/盎司的8月份黄金看涨期权，又以6美元/盎司的权利金卖出1份执行价格为800美元/盎司的8月份黄金看跌期权，再以市场价格801美元/盎司卖出1份8月份黄金期货合约。则该投资者的获利是( )美元/盎司。

A．2
B．402
C．1
D．400