If a company is currently operating at its breakeven point, which of the following statements is true? (Income tax considerations are ignored) a. If fixed costs increase, net income will decrease by the contribution margin ratio times the amount of the increase in fixed costs. b. If sales increase by 20%, net income will also increase by 20%, assuming that fixed costs are not equal to zero. c. If variable costs double, net income will decrease by 50%. d. Net income will decrease by the decrease in number of units sold times the contribution margin per unit. some say c, i say b