A cloud administrator is monitoring a database system and notices an unusual increase in the read operations, which is causing a heavy load in the system. The system is using a relational database and is running in a VM.
Which of the following should the administrator do to resolve the issue with minimal architectural changes?

A. Migrate the relational database to a NoSQL database
B. Use a cache system to store reading operations
C. Create a secondary standby database instance
D. Implement the database system using a DBaaS