You are running a successful multitier web application on AWS and your marketing department
has asked you to add a reporting tier to the application. The reporting tier will aggregate and
publish status reports every 30 minutes from user-generated information that is being stored in
your web application’s database.
You are currently running a Multi-AZ RDS MySQL instance for the database tier.
You also have implemented ElastiCache as a database caching layer between the application tier
and database tier. Please select the answer that will allow you to successfully implement the
reporting tier with as little impact as possible to your database:

A.
Launch a RDS Read Replica connected to your Multi AZ master database and generate reports
by querying the Read Replica.

B.
Continually send transaction logs from your master database to an S3 bucket and generate the
reports off the S3 bucket using S3 byte range requests.

C.
Generate the reports by querying the ElastiCache database caching tier.

D.
Generate the reports by querying the synchronously replicated standby RDS MySQL instance
maintained through Multi-AZ.