When a feature class has subtypes, which options are valid for working with domains? (Choose two.)

When working with feature classes that have subtypes in a geodatabase, it is important to understand how domains can be utilized to enforce data integrity and ensure consistency across features.

The first valid option states that a domain can be added at any time to the geodatabase. This is true because domains are flexible and can be created and added post geodatabase creation. They are not restricted to being established exclusively at the time of feature class creation, allowing for adjustments and improvements in data management as requirements evolve.

Additionally, when considering how domains interact with feature classes with subtypes, it is critical to recognize that domains can also be set at the field level to provide specific value constraints. This means that each field within a feature class can utilize a domain independently, enhancing the organizational structure for data entry and validation. However, in this case, applying a domain at the subtype level is also valid for subtypes specifically, as it serves to provide different valid values for different subtypes, thereby enforcing rules that are specific to each subgroup within the feature class.

Thus, understanding that domains can be added dynamically allows for effective management and refinement of databases, while their application at the field level showcases their importance in ensuring data consistency across various aspects of the geod