What are the 3 key steps that a data architect should take when merging data from multiple systems into Salesforce?

UC has a variety of systems across its technology landscape, including SF, legacy enterprise resource planning (ERP) applications and homegrown CRM tools. UC has decided that they would like to consolidate all customer, opportunity and order data into Salesforce as part of its master data management (MDM) strategy.

What are the 3 key steps that a data architect should take when merging data from multiple systems into Salesforce? Choose 3 answers:
A . Create new fields to storeadditional values from all the systems.
B. Install a 3rd party AppExchange tool to handle the merger
C. Analyze each system’s data model and perform gap analysis
D. Utilize an ETL tool to merge, transform and de-duplicate data.
E. Work with Stakeholders to define record and field survivorship rules

Answer: C,D,E