Which of the following statements is CORRECT? Select one: a. The margin of safety percentage multiplied by the percent change in sales equals the percent change in net income. b. If a publicly-traded company decides to report net income using variable costing instead of absorption costing, it must notify stockholders (and the SEC) within 30 days C. The fraction that results when net income is divided by contribution margin is one example of degree of financial leverage. d. It is possible for the breakeven point to also be the point of indifference. e. When a company notices that this year's net income will actually be a net loss, the company should immediately shut down