Choice "D" is correct. Operations of a government whose costs are primarily supported by outside user charges would normally be accounted for in an Enterprise Fund.Choice "b" is incorrect. Internal Service Funds account for activities supported by user charges that benefit internal users, not those (such as a utility) that benefit the general citizenry.Choice "a" is incorrect. The General Fund typically accounts for all general governmental activities not otherwise accounted for in other funds. A utility supported by users would be accounted for in an Enterprise Fund.Choice "c" is incorrect. Private Purpose Funds account for resources that benefit private individuals, not those (such as a utility) that benefit the general citizenry.