Final answer:
The voting in large public corporations is primarily done by shareholders.
Step-by-step explanation:
The correct answer is b) Shareholders.
When a firm becomes a public company and sells stock to investors, those investors become shareholders and have the right to vote in certain matters of the company, including the election of the board of directors. The shareholders, who can comprise thousands or even millions of individuals, typically vote for the board of directors, who in turn hire top executives to manage the company.
CEOs, board members, and managers may play important roles in running the company, but it is the shareholders who ultimately have the power to vote and make decisions regarding the company's operations.