What should the solution architect recommend?

An ecommerce company has noticed performance degradation of its Amazon RDS based web application. The performance degradation is attribute to an increase in the number of read-only SQL queries triggered by business analysts. A solution architect needs to solve the problem with minimal changes to the existing web application.

What should the solution architect recommend?
A . Export the data to Amazon DynamoDB and have the business analysts run their queries.
B . Load the data into Amazon ElasticCache and have the business analysts run their queries.
C . Create a read replica of the primary database and have the business analysts run their queries.
D . Copy the data into an Amazon Redshift cluster and have the business analysts run their queries.

Answer: C