Who Has a Right to Receive Dividends

Who has a right to receive dividends?

A) both preferred and common shareholders at all times
B) both preferred and common shareholders,so long as the corporation has adequate profit
C) preferred shareholders at all times when the corporation has adequate profit,and common shareholders whenever dividends have been declared
D) both preferred and common shareholders,but only when dividends have been declared
E) neither preferred nor common shareholders ever have a right to the payment of dividends,even after their declaration