Statistics show that men have ___ as women do for every mile they drive.

A．serious accidents as twice many

B．twice as many serious accidents

C．twice serious accidents as many

D．serious accidents as many twice

如果要求的股票投资回报率为8%，股票下一年支付的股利是0.5美元，预期股票下一年的售价为30美元，根据单阶段股票估值模型，该股票今天的价格是多少？（）

A.27.78美元；

B.28.24美元；

C.30美元；

D.30.5美元。