Which three recommendations should a Solution Architect suggest to migrate to the new application in the most efficient manner?

Ohana Cirrus (OC) has around 1,500 support agents working in its global support center operating 24/7 across multiple channels. This center handles around 30,000 cases per day. OC currently uses a custom-developed solution to manage customer complaints and is planning to replace it with a new Salesforce solution. The current system contains more than 250 million records including some still being processed.

Which three recommendations should a Solution Architect suggest to migrate to the new application in the most efficient manner? Choose 3 answers
A . Use an interface to copy data from the legacy complaint system to Salesforce using a scheduled MuleSoft batch.
B. Migrate archived data to Heroku and active and semi-active data to Salesforce.
C. Migrate all complaint records m the Case object to provide a 360-degree customer view.
D. Use Deferred Sharing Calculations to avoid record sharing calculations during data migration.
E. Use an EU tool that uses the Salesforce Bulk API to migrate the data from the legacy system to the new system.

Answer: B,D,E