Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

A disadvantage of the EV method for valuing equity is that the following information may be difficult to obtain:
Option A:Operating income.
Option B:Market value of debt.
Option C:Market value of equity.

Answer: B