What should be done to address the issue with duplicate leads?

Northern Trail Outfitters gains sales leads at its annual trade show. Duplicate leads are generated when they are imported and already exist in the system.

What should be done to address the issue with duplicate leads?
A . Upload the leads to Data.com to remove the duplicates and select the option to have them automatically imported.
B . Upload the leads and click the "Find Duplicates" button for each of the leads to identify potential duplicate lead records.
C . Upload the leads using Data Loader and enable the "Find Duplicates" setting to prevent duplicate records.
D . Upload the leads using the Data Import Wizard and select the appropriate field to match duplicates against existing records.

Answer: D