AWS Certified SysOps Administrator - Associate SOA-C02 — Question 61

A company has a stateful, long-running workload on a single xlarge general purpose Amazon EC2 On-Demand Instance Metrics show that the service is always using 80% of its available memory and 40% of its available CPU. A SysOps administrator must reduce the cost of the service without negatively affecting performance. Which change in instance type will meet these requirements?