Columnist: A government-owned water utility has received approval to collect an additional charge on water bills and to use that additional revenue to build a dam. A member of the legislature has proposed not building the dam but instead spending the extra money from water bills to build new roads. That proposal is unacceptable. Which one of the following principles, if valid, most helps to justify the columnist's judgment that the legislator's proposal is unacceptable? ['Customers of a utility have a right to know how the money they pay to the utility will be used.', 'An additional charge on water bills should not be imposed unless it is approved by the legislature.', 'A water utility should not collect an additional charge unless the money collected is used for water-related expenditures.', 'Money designated for projects that benefit an entire community should not be used for projects that benefit only some members of a community.']