Engineering Economy 7th Edition by Leland Blank ,Anthony Tarquin

Exercise 4

Of the following scenarios, alternative Y requires a higher initial investment than alternative X, and the MARR is 20% per year. The only scenario that requires an incremental investment analysis to select an alternative is that:
a) X has an overall ROR of 22% per year, and Y has an overall ROR of 24% per year
b) X has an overall ROR of 19% per year, and Y has an overall ROR of 23% per year
c) X has an overall ROR of 18% per year, and Y has an overall ROR of 19% per year
d) X has an overall ROR of 28% per year, and Y has an overall ROR of 26% per year