What is the best way to ensure that all data has been removed from a public cloud environment including all media such as back-up tapes?

What is the best way to ensure that all data has been removed from a public cloud environment including all media such as back-up tapes?
A . Allowing the cloud provider to manage your keys so that they have the ability to access and delete the data from the main and back-up storage.
B . Maintaining customer managed key management and revoking or deleting keys from the key management system to prevent the data from being accessed again.
C . Practice Integration of Duties (IOD) so that everyone is able to delete the encrypted data.
D . Keep the keys stored on the client side so that they are secure and so that the users have the ability to delete their own data.
E . Both B and

View Answer

Answer: B