Which backup architecture will meet these requirements?

Your customer wishes to deploy an enterprise application to AWS which will consist of several web servers,
several application servers and a small (50GB) Oracle database information is stored, both in the database and
the file systems of the various servers. The backup system must support database recovery whole server and
whole disk restores, and individual file restores with a recovery time of no more than two hours. They have
chosen to use RDS Oracle as the database
Which backup architecture will meet these requirements?

A.
Backup RDS using automated daily DB backups Backup the EC2 instances using AMIs and supplement
with file-level backup to S3 using traditional enterprise backup software to provide file level restore

B.
Backup RDS using a Multi-AZ Deployment Backup the EC2 instances using Amis, and supplement by
copying file system data to S3 to provide file level restore.

C.
Backup RDS using automated daily DB backups Backup the EC2 instances using EBS snapshots and
supplement with file-level backups to Amazon Glacier using traditional enterprise backup software to
provide file level restore

D.
Backup RDS database to S3 using Oracle RMAN Backup the EC2 instances using Amis, and supplement
with EBS snapshots for individual volume restore.

Explanation:
http://www.boyter.org/wp-content/uploads/2014/12/Backup-And-Recovery- Approaches-Using-Aws.pdf