A GIS technician creates a domain that will be used in a feature class where...

After a domain is created, the codes and values (descriptions) can be edited to correct or update the domain entries. However, the field type and domain type (range or coded value) cannot be changed once the domain has been applied to a dataset.

Field type (Option A) cannot be modified after creation.

Domain type (Option C) also cannot be changed after creation.

Therefore, the correct answer is B.

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