Which 3 recommendations should a data architect provide to prevent ownership skew?

UC migrating 100,000 Accounts from an enterprise resource planning (ERP) to salesforce and is concerned about ownership skew and performance.

Which 3 recommendations should a data architect provide to prevent ownership skew? Choose 3 answers:
A . Assigned a default user as owner of accounts, and assign role in hierarchy.
B . Keep users out of public groups that can be used as the source for sharing rules.
C . Assign a default user as owner of account and do not assign any role to default user.
D . Assign “view all” permission on profile to give access to account.
E . Assign a default user as owner of accounts and assigned top most role in hierarchy.

Answer: B,C,E