An Application Performs Read-Heavy Operations on an Amazon Aurora DB

Multiple Choice

An Application performs read-heavy operations on an Amazon Aurora DB instance. A SysOps Administrator monitors the CPUUtilization CloudWatch metric and has recently seen it increase to 90%. The Administrator would like to understand what is driving the CPU surge. Which of the following should the Administrator additionally monitor to understand the CPU surge?

A) FreeableMemory and DatabaseConnections to understand the amount of available RAM and number of connections to DB instance.
B) FreeableMemory and EngineUptime to understand the amount of available RAM and the amount of time the instance has been up and running.
C) DatabaseConnections and AuroraReplicaLag for the number of connections to the DB instance and the amount of lag when replicating updates from the primary instance.
D) DatabaseConnections and InsertLatency for the number of connections to the DB instance and latency for insert queries.