Answer: Option A
Explanation: In simple words, WACC refers to the cost of total capital that a company has borrowed form the market in its weighted average form. It includes all sources of debt whether retained earning, equity, debt or preferred stock.
While calculating WACC the analyst takes the market value of the capital sources into consideration, thus, in case of preferred stock the cost of newly issued preferred shares must be taken as they depict the actual cost that the company has to bear.