Which of the following descriptions is NOT an example of a common type of dividend policy?

a firm pays a certan percentage of its profits to shareholders each year, which means that the dividend fluctuates.

throughout the year, stockholder receive a dividend for a stated amount plus a supplemental dividend depending on proftis

Stockholder can contact firms whenever they need extra cash to collect their dividends, for a small fee.

the firm pays a certain dollar amount as a dividend whenever it can afford to do so, and adjustments up or down in the dollar amount can be made by the manager.