Professor Smith has written some short stories , but he is _____known for his plays .

A．better

B．more

C．best

D．most

季先生以0.5元每股的价格买入行权价为20元的某股票认沽期权（合约单位为10000股），则股票在到期日价格为（）元时，王先生能取得2000元的利润。

A、19.5

B、20.5

C、19.3

D、20.3