Answer: Asset distribution preference
Explanation: Preference shareholders have the right to receive fixed amount of dividends as opposed to equity shareholders who get variable dividends, also preference shareholders are paid before equity holders.
Apart from this, in event of liquidation of a company, preference shareholders will have the right on assets of the company before equity shareholders but after debt holders.
Thus, from the above we can conclude that the right answer is D, the asset distribution preference of the preferred stockholders. As, in such a case preferred stockholders have a chance to have their money back.