Attribute domains are a property of which of the following?

The correct choice is that attribute domains are a property of a geodatabase. In the context of a geodatabase, attribute domains define the valid values for an attribute. This helps ensure data integrity and consistency across feature classes and tables that utilize the geodatabase. Attribute domains can be used to restrict the input of values to predefined lists or ranges, which is particularly beneficial for ensuring that data remains accurate and consistent, promoting better data quality.

While feature classes and tables can utilize attribute domains defined at the geodatabase level, they do not have their own separate set of domains—they rely on the rules established within the geodatabase itself. Feature datasets are collections of feature classes and can reference domains set at the geodatabase level, but they are not the entities that define the domains. Therefore, when considering where attribute domains are specifically defined and managed, the geodatabase is the most accurate choice.