the answer for this question is letter B provide solution

13. Which of the following are assumptions for break-even analysis? 1. Elements of cost cannot be divided in different groups, 11. Fixed cost remains certain from zero production to full capacity. m. Behavior of different costs is linear. IV. Selling price per unit remains constant a. I, II and III c. 1, III, and TV b. II, III, and IV d. I, II, and IV