An analyst is estimating the cost of capital for her firm. She has estimated the before-tax costs of the current sources of capital to be 8 percent of debt and 9 percent for equity, If the firm’s marginal tax rate is 40 percent, the costs of debt and equity she could use in her calculation are closest to:()

A. 4.8% for debt and 5.4% for equity.

B. 4.8% for debt and 9.0% for equity.

C. 8.0% for debt and 5.4% for equity.

室内首层地面标高为±0.000，基础地面标高为-1.500，室外地坪标高为-0.600，则基础埋置深度为（）m。

A.1.5

B.2.1

C.0.9

D.1.2