In 1958, Modigliani and Miller (M\&M) published research concerning capital structure. Which of the following is true of their 1958 research? A. They showed that, given their assumptions, changes in capital structure have no effect on the firm's value. B. They showed that, given their assumptions, firms should increase their leverage in order to increase the firm's value. C. They assumed that there were no taxes. D. Both A and C are true. E. Both B and C are true