What should the data architect do for a successful migration to mitigate the pain point?

Universal Containers (UC) is migrating from an on-premise homegrown customer relationship management (CRM) system- During analysis, UC users highlight a pain point that there are multiple versions of many customers.

What should the data architect do for a successful migration to mitigate the pain point?
A . Hire an intern manually de-duplicate the records after migrating to Salesforce.
B. Migrate the data as is, and use Salesforce’s de-duplicating feature.
C. Have the users manually clean the data in the old system prior to migration.
D. Store the data in a staging database, andde-duplicate identical records.

Answer: D