下列提示结核病灶痊愈的是 （）

A.结节性病灶

B.病灶的钙化和骨化

C.病灶干酪样坏死

D.增生性病变

E.病灶周围纤维化

Assume that a firm has an expected dividend payout ratio of 20%, a required rate of return of 9% , and an expected dividend growth of 5%. What is the firm's estimated price-to-earnings (P/E) ratio（）

A. 5.00.

B. 10.00.

C. 20.00.