Which set of Amazon S3 features helps to prevent and re…

Which set of Amazon S3 features helps to prevent and recover from accidental data loss?

A.
Object lifecycle and service access logging

B.
Object versioning and Multi-factor authentication

C.
Access controls and server-side encryption

D.
Website hosting and Amazon S3 policies

Explanation:
Versioning-enabled buckets enable you to recover objects from accidental deletion or overwrite. In addition to
that, they have made it a requirement that delete operations on versioned data can only be done using MFA
(Multi factor authentication).

http://media.amazonwebservices.com/AWS_Security_Best_Practices.pdf