Which of the following is true of the management structure of corporations in the United​ States? A. Members of management who are inside directors serve on the board of directors. B. Large corporations are legally owned by shareholders who do usually not directly manage the firm. C. The chief executive officer runs the​ day-to-day operations of the corporation but does not sit on the board of directors. D. Large corporations are legally owned by a board of directors that directly manages the firm. E. Both a and b.