Why not buy him _______ MP4 as_______ birthday present since he likes music?

A．an; the

B．the; the

C．an；a

D．a; a

下列各项中不属于期权投资可考虑的投资策略的是( )。

A．预计期权标的物价格将上升时，卖出认购期权

B．预计期权标的物价格将下降时，买入认售期权

C．买进认售期权同时买入期权标的物

D．买进认购期权同时卖出期权标的物