Which of the following statements is CORRECT?

Select one:

a. If you solve for I and get a negative number, then you must have made a mistake.

b. If you have a series of cash flows, each of which is positive, you can solve for I, where the solution value of I causes the PV of the cash flows to equal the cash flow at Time 0.

c. If you have a series of cash flows, and CF₀ is negative but each of the following CFs is positive, you can solve for I, but only if the sum of the undiscounted cash flows exceeds the cost.

d. If CF₀ is positive and all the other CFs are negative, then you can still solve for I.