An analyst does research about book value and gathers the following information from a company's balance sheet (in millions):
| Shareholders' equity | $150 |
| Preferred stock | $25 |
| Total liabilities | $50 |
| Issued common shares | 75 |
| Repurchased common shares | 20 |
The company's book value per share is closest to:（）
A. $1.67
B. $2.27
C. $2.73