Which action will resolve this issue?
Configure AWS Database Migration Service (AWS DMS) to allow Amazon RDS for MySQL to scale and accept more requests.
Configure RDS for MySQL to scale horizontally by adding additional nodes to offload write requests.
Enable the Multi-AZ feature for the RDS instance.
Modify the RDS MySQL instance so it is a larger instance type.
Explanations:
AWS Database Migration Service (DMS) is used for database migration, not for scaling RDS instances or improving performance during load testing.
Scaling RDS for MySQL horizontally by adding additional nodes helps with read scalability, but does not directly resolve CPU utilization issues that are related to write performance.
Enabling the Multi-AZ feature provides high availability and disaster recovery, but it does not directly address the issue of high CPU utilization caused by load testing.
Modifying the RDS MySQL instance to a larger instance type increases CPU capacity, which resolves the issue of 100% CPU utilization during high loads.
I compute that the answer is:
Modify the RDS MySQL instance so it is a larger instance type.