A break-even chart has been set up to show the current break-even point. Due to an increase in the price of raw materials, the variable cost per unit has increased. Assume all other costs and the selling price per unit remains constant. How does this change in the variable cost per unit affect the break-even chart? Select one: a. The y-intercept of the total cost line increases. b. The slope of the total cost line increases. c. The break-even point in units decreases. d. The y-intercept of the total cost line decreases