Answer:
B) Differing lives and planned replacement at end of life.
Explanation:
The equivalent annual cost (EAC) method of analysis refers to the equivalent annual cost of owning and operating a machine. It is calculated by:
EAC = NPV of (the machine + operation costs) / PV of annuity factor
This method is used to compare the values of machines (or other assets) that have different useful lives, usually you should choose the machine (or asset) with the lowest EAC.