Question: When comparing mutually exclusive alternatives that have different lives by the present worth method, it is necessary to: a) Always compare them over a period

When comparing mutually exclusive alternatives that have different lives by the present worth method, it is necessary to: a) Always compare them over a period equal to the life of the alternative with the longest life b) Always compare them over a period equal to the life of the alternative with the shortest life c) Find the present worth over one life cycle for each alternative d) Always compare them over equal lives (which is the least common multiple of the lives of all the alternatives)
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