Answer: Option a
Explanation: In simple words, preferred shareholders refers to the holders of preference shares of an organisation. Unlike common stock, preferred stock are the securities on which the holders receives a fixed amount of payment but only if the occupancy have appropriate amount of profits to distribute.
Preference shareholders have the right to get paid before equity shareholders but after the debenture holders and their returns are usually higher than debt holders but smaller than equity holders.
Therefore, due to being less risky than equity holders these shareholders do not get any voting rights in the company as equity shareholders.