Which three recommendations should a data architect make is order to reduce the number of records from the org?

Universal Container (UC) has accumulated data over years and has never deleted data from its Salesforce org. UC is now exceeding the storage allocations in the org. UC is now looking for option to delete unused from the org.

Which three recommendations should a data architect make is order to reduce the number of records from the org? Choose 3 answers
A . Use hard delete in Bulk API to permanently delete records from Salesforce.
B . Use hard delete in batch Apex to permanently delete records from Salesforce.
C . Identify records in objects that have not been modified or used In last 3 years.
D . Use Rest API to permanently delete records from the Salesforce org.
E . Archive the records in enterprise data warehouse (EDW) before deleting from Salesforce.

Answer: A,C,E