If CF0 is -$155,555, CF1 and CF2 are both $45,000, CF3 is $55,000, CF4 is zero, CF5 and CF 6 and CF7 are $44,000 and CF 8 is zero, what happens if the discount rate is decreased?: a. The NPV goes higher b. There are multiple IRRs c. The IRR goes way down d. The NPV is zero by definition