Managers always need to keep their relevant range in mind when predicting total costs. the relevant range is the band of volume where total fixed costs remain constant as well as where variable cost per unit remains constant. a change in the relevant range can lead to a change in cost behavior. increasing the relevant range can turn a:
a) fixed cost into a step fixed costb) fixed cost into a variable costc) variable cost into a fixed costd) step cost into a mixed cost

Ronald sees that his employer's stock has grown from $20 a share to $60 a share this year, while most stocks have seen only 5% growth. his employer offers to let him convert a large portion of his salary into stock options. what is not a valid reason to turn down the stock offer? a)stocks with high returns have high volatility, and ronald's company may not grow further. b)ronald may be taxed more for capital gains than he would be for employment income. c)stock options are illiquid, and ronald may not be able to use them to pay for unexpected bills. d)ronald would be committing stock fraud if he exercises the options.