The correct answer is D. Check the box to export multiple-choice fields as nested. Relativity's official export documentation states that Export Multiple Choice Fields as Nested is the option used to maintain the hierarchy of Relativity multiple-choice lists during export. It further explains that the nested value delimiter is a backslash, which preserves the parent-child structure of those choices in the exported data.
This means the hierarchy is not lost by default if the appropriate export option is selected, so option A is incorrect. Sorting on the field does not preserve the nested hierarchy, making option B wrong. Exporting as CSV for Excel recognition is also not the documented mechanism, so option C is incorrect. From an RCA and data loading standpoint, this setting matters because exported hierarchical values often need to be re-used downstream, re-imported, or validated in a way that preserves their original structure. Without the nested export option, the relationship between parent and child values may not be represented correctly. Therefore, the proper way to maintain multiple-choice hierarchy when exporting a saved search through Import/Export is to check the box to export multiple-choice fields as nested .