沪深300股指货的交割结算价是依据（）确定的。

A.最后交易日沪深300指数最后两个小时的算术平均价

B.最后交易日最后5分钟期货交易价格的加权平均价

C.从上市至最后交易日的所有期货价格的加权平均价

D.最后交易日的收盘价

Tom is a stubborn and careful man; It took many hours to_______ him of my good idea and to give up his.

A．ask

B．convince

C．remind

D．accuse