Broca Corporation has a current ratio of 2.5. Which of the following transactions will increase Broca's current ratio? Select one: O a. the purchase of inventory for cash. O b. the collection of an account receivable. O c. the payment of an account payable. d. none of the above. At the break-even point: Select one: O a. sales would be equal to contribution margin. O b. contribution margin would be equal to fixed expenses. c. contribution margin would be equal to net operating income. O d. sales would be equal to fixed expenses