Final answer:
The correct answer to the student's question is e. The discounted payback period will be longer than the regular payback period, as it accounts for the time value of money by discounting future cash flows.
Step-by-step explanation:
The student has asked what is true about using discounted payback analysis for projects with only positive cash flows after the initial outlay and a positive discount rate. The correct answer to this question is e. The discounted payback period will be longer than the regular payback period because the future cash flows are discounted to their present value, making the payback period appear longer. Answer b is incorrect because a project can fail to pay back on a discounted basis and still have a negative NPV, while d is incorrect because a shorter discounted payback does not necessarily mean a smaller NPV. Discounted payback is also not simpler to calculate than regular payback, which invalidates option c. Lastly, while the cutoff period for simple payback is indeed set by management, this fact alone does not justify why discounted payback is better, making option a incorrect as well.