nayana-c1.867c992ae9100904cc61c84591adf0f8f863e0387e30f0d0dbc86640e9f50a1a.te.train.84107

The task

Which of the following is NOT a requirement for a qualified energy efficiency improvement? A. It must meet the Energy Star program requirements. B. It must be installed in a dwelling located in the U.S. C. It must be installed in a commercial property. D. It must reasonably be expected to remain in use for at least five years. Return only the single uppercase letter of the correct option.