OMT plc has just issued Debentures with an 7% coupon which are currently yielding 5.0% before-tax. The company's cost of equity finance is 12.3% and OMT has estimated its weighted average cost of capital (WACC) to be 8.5%. It is deciding whether to lease or buy a new machine. It is currently in a tax exhaustive position but is usually liable to pay corporation tax at a rate of 19% per annum. Which of the following should OMT plc use as the discount rate in its lease/buy decision-making process? O A. 4.1% OB.5.0% O C. 12.3% 0.8.5% E. 7.0%