---You were brave enough to raise objections at the meeting.

---Well, now I regret ____ that.   

A. to do    b. to be doing   C. to have done    D. having done

某投资者购买了50000美元利率挂钩外汇结构性理财产品，该理财产品与LIBOR挂钩，协议规定：当LIBOR处于2%～2.75%区间时，给予高收益率6%；若任何一天LIBOR超出2%～2.75%区间，则按低收益率2%计算；若实际一年中LIBOR在2%～2.75%区间为90天。则该产品投资者的收益为( )美元。(假定一年按360天计算)

A．750
B．1500
C．2500
D．3000