Universal Containers (UC) has Account and Contact data it wants to migrate to Sales Cloud.

When migrating data to Sales Cloud, especially from various sources with potentially unknown data quality, Duplicate Jobs are useful for assessing and managing duplicates within Salesforce. Duplicate Jobs allow consultants to identify duplicate records across the data set before loading it into production.

Using Duplicate Jobs for Data Quality Assessment: Duplicate Jobs can run against imported data in a sandbox environment to identify and report potential duplicate records, allowing for cleansing and merging as necessary.

Ensuring Clean Data Migration: This method enables data assessment and cleanup without impacting the live system, which is essential for maintaining operations while ensuring data quality.

Option A (Import Wizard) is more suited for small-scale imports, and Option C (External IDs) are mainly for data relationships rather than quality assessment. Salesforce’s Duplicate Management documentation provides more insights on using Duplicate Jobs for data quality checks.