Which is correct?

Your firm has uploaded a large amount of aerial image data to S3. In the past, in your on-premises
environment, you used a dedicated group of servers to oaten process this data and used Rabbit MQ – An open
source messaging system to get job information to the servers. Once processed the data would go to tape and
be shipped offsite. Your manager told you to stay with the current design, and leverage AWS archival storage
and messaging services to minimize cost.
Which is correct?

A.
Use SQS for passing job messages use Cloud Watch alarms to terminate EC2 worker instances when they
become idle. Once data is processed, change the storage class of the S3 objects to Reduced Redundancy
Storage.

B.
Setup Auto-Scaled workers triggered by queue depth that use spot instances to process messages in SOS
Once data is processed,

C.
Change the storage class of the S3 objects to Reduced Redundancy Storage. Setup Auto-Scaled workers
triggered by queue depth that use spot instances to process messages in SQS Once data is processed,
change the storage class of the S3 objects to Glacier.

D.
Use SNS to pass job messages use Cloud Watch alarms to terminate spot worker instances when they
become idle. Once data is processed, change the storage class of the S3 object to Glacier.