An investment Multiple Choice O is acceptable if its calculated payback period is less than some prespecified period of time. should be accepted if the payback is positive and rejected if it is negative. should be rejected if the payback is positive and accepted if it is negative. O is acceptable if its calculated payback period is greater than some prespecified period of time. O should be accepted any time the payback period is less than the discounted payback period, given a positive discount rate