问题如下：
A drawback of the EV approach for assessing equity is that the following information may be hard to obtain:
选项：
A. Net income.
B. Market value of debt.
C. Market value of equity.
解释：
B is correct.
As stated by the reading, analysts may not gain access to firm debt.
有债券市场存在，这个debt怎么就不好取得了呢？
