A Company Has an Ecommerce Application That Stores Data in an On-Premises

A company has an ecommerce application that stores data in an on-premises SQL database. The company has decided to migrate this database to AWS. However, as part of the migration, the company wants to find a way to attain sub-millisecond responses to common read requests. A solutions architect knows that the increase in speed is paramount and that a small percentage of stale data returned in the database reads is acceptable. What should the solutions architect recommend?

A) Build Amazon RDS read replicas.
B) Build the database as a larger instance type.
C) Build a database cache using Amazon ElastiCache.
D) Build a database cache using Amazon Elasticsearch Service (Amazon ES) .