Maintaining internal links and formatting when migrating knowledge base articles requires careful preparation. Exporting articles in formats that preserve these elements ensures they are retained during the migration. Manually reviewing articles allows for adjustments to links and formatting that may not automatically transfer correctly. Data transformation tools can automate some adjustments, adapting articles to the new system's requirements. Thus, "D. All of the above, depending on the capabilities of the existing and new knowledge base systems for handling formatting and links" provides a comprehensive strategy for effectively maintaining article integrity during migration.
Reference: Salesforce Knowledge Base Migration