单选题
An analyst does research about capital asset pricing model approach and gathers the following information about a company and the market:
| Equity beta | 1.5 |
| Equity risk premium | 15% |
| Risk-free rate | 3% |
| Before-tax cost of company's debt | 9% |
Using the capital asset pricing model approach, the company's cost of equity capital is closest to:
A. 18.0%
B. 21.0%
C. 25.5%