Cost, Waste, Health and Environment

Correct Answer

D — 1, 2, 3 and 4

Concept and Reasoning

Energy management and auditing aim to reduce energy cost and waste while improving efficient resource use and reducing adverse environmental and pollution-related impacts. In the wording of the source, all four listed objectives belong to this broader purpose, so option D is correct.

Calculation / Key Relation

Energy audit: measure → analyze → identify conservation opportunities → reduce cost/waste/impact

Exam Takeaway

Energy audit is both economic and environmental, not only a billing exercise.

Common Mistake

Do not restrict an energy audit objective to cost reduction alone.