在用class定义一个类时，数据成员和成员函数的默认权限是 【10】 。

A company has the following capital structure: Target weightings: 30% debt, 20% preferred stock, 50% common equity. Tax Rate: 35%. The firm can issue $1000 face value, 7.00% semi-annual coupon debt with a 15-year maturity for a price of $1047.46. An 8.0% dividend preferred stock issue has a value of $35 per share. The company’s growth rate is estimated at 6.0%. The company’s common shares have a value of $40 and a dividend in year 0 of DO = $3.00. The company’s weighted average cost of capital is closest to:（）

A. 9.84%.

B. 9.28%.

C. 9.21%.