Which two features and best practices should a Salesforce architect recommend to mitigate this risk?

To grant Universal Containers sales manager access to shipment records properly, it was necessary to leverage Apex managed sharing. The IT team is worried about improper access to records.

Which two features and best practices should a Salesforce architect recommend to mitigate this risk?
A . Use run As system method in test classes to test using different users and profiles.
B. Use with Sharing keyword in Apex classes to assure record visibility will be followed.
C. Use is Shareable in Apex classes to assure record visibility will be followed.
D. Use is Accessible keyword in Apex classes to assure record visibility will be followed

Answer: A,B