Which of the following statements is true: Select one: O a. All the options below are correct O b. The higher your personal "r" (or "R"), the more likely it will be that earning a UNC-CH MBA makes sense (i.e., to spend time and money over two years earning an MBA to put yourself in a position to make more money than you would otherwise every year after that) O c. The higher your personal (or R), the more likely it is that it will make sense for you to sell your winning lottery ticket O d. The higher your personal r" (or R), the higher the present value of a future payment