A Company Is Running a Multi-Tier Web Application on AWS

A company is running a multi-tier web application on AWS. The application runs its database tier on Amazon Aurora MySQL. The application and database tiers are in the us-east-1 Region. A database administrator who regularly monitors the Aurora DB cluster finds that an intermittent increase in read traffic is creating high CPUutilization on the read replica and causing increased read latency of the application. What should a solutions architect do to improve read scalability?

A) Reboot the Aurora DB cluster.
B) Create a cross-Region read replica
C) Increase the instance class of the read replica.
D) Configure Aurora Auto Scaling for the read replica.