Final answer:
Both the shareholders' and the board of director's approval must be obtained when a corporation desires to address a potential takeover.
Step-by-step explanation:
A corporation requires both the shareholders' and the board of director's approval when it desires to address a potential takeover. This means that in order for the corporation to take any action related to a potential takeover, such as implementing defensive measures or entering into negotiations, it needs the approval of both its shareholders and board of directors. This ensures that the decision is made in the best interest of the company and its stakeholders.