下面是关于Pentium 微处理器中寄存器的叙述。其中错误的是

A．通用寄存器既可以存放操作数，也可以存放操作数地址

B．段寄存器在保护模式下直接提供访问存储器的段地址

C．指令指针寄存器专门用来存放指令的地址

D．标志寄存器存放状态标志和控制标志

A company is planning a new issue of $100 par preferred stock with a 12 percent dividend. The preferred stock can be sold for $95 per share and the company must pay flotation costs of 5 percent of the market price. Assuming a marginal tax rate of 40 percent, the after-tax rate of 40 percent, the after-tax cost of the preferred stock is closest to:（）

A. 8.0%.

B. 12. 6%.

C. 13.3%.