You are the CEO of a conglomerate and are evaluating a project in the furniture business. Your company is financed $50\%$ by debt and will always remain that way. You have found public data on three pure play furniture companies: Company $x$ is solely financed by equity and has the same market capitalization as your company, Company $Y$ is financed $50\%$ by debt and $50\%$ by equity, and company $Z$ is solely financed by equity but is much smaller than your company. Which of the following statements is TRUE when it comes to calculating the cost of capital $($aka expected return on assets$)$ for your project? $($Ignore taxes.$)$

You should only use data from Company $Y$ since it has the same capital structure as your company

You should only use data from Company $x$ and Company $Z$ since they are both unlevered firms and you are calculating the unlevered cost of capital for the project

You should only use data from Company $x$ since it is unlevered and has the same market capitalization as your company

You can use data from all three companies in your calculations