Is my answer correct?

The IRR system of project evaluation for selecting one of two mutually exclusive projects: A. has the disadvantage or ignoring future cash flows, like that of the discounted payback period rule. B. may give different results from NPV if the two projects have a different scale of investment and cash flow returns. C. should always be used in conjunction with the discounted payback system of project evaluation. D. always provides at least one value for the IRR of each of the projects. E. is consistent with both (B) and (D) above. F. is consistent with (A), (C) and (D) above