Nortel Industries has a preferred stock outstanding that pays (fixed) annual dividends of $3.75 a share. If an investor wants to earn a rate of return of 8.5 percent, how much should he be willing to pay for a share of Nortel preferred stock（）

A. $44.12.

B. $31.88.

C. $37.50.

下列哪一项是以摄氏温标为基础、把水的冰点定为273.16度，水的沸点定为373.16度，理论上物质分子全部停止运动之温度作为零度，以符号『ºK』表示之温标名称（）

A.开氏温标

B.摄氏温标

C.华氏温标

D.罗氏温标