15. Which of the following defines Equal Annual Equivalent (EAEJ? a. It is the difference between the present value of revenues and the present value of costs over some period of time b. It is the NPV of an investment in an even-aged stand from the time of planting (when the land is bare of trees), through infinite rotations of the same management c. It is the present value of the revenues associated with an investment divided by the present value of the costs ou can obtain (or will incur) annually, over the life of an investment, given the discount rate that was applied