medium · GMAT Verbal
This year, a municipal water utility audited every household that had requested a conservation rebate, and no household was audited twice. More than half of the audited households had replaced at least one high-flow fixture in the past year, and more than half of the audited households had reduced their average daily water usage by at least fifteen percent compared with the prior year.
If the statements above are true, which of the following must also be true?
- Most of the audited households both replaced a high-flow fixture and reduced their average daily usage by at least fifteen percent.
- The household that reduced its average daily usage the most also replaced the greatest number of high-flow fixtures.
- At least one audited household both replaced a high-flow fixture and also cut its usage by at least fifteen percent this year.
- Every audited household either replaced a high-flow fixture or reduced its average daily usage by at least fifteen percent, or both.
- The utility audited more households that reduced their usage by at least fifteen percent than households that replaced a high-flow fixture.
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