A. Deploying all workloads on the highest performance instances, regardless of cost.
B. Reducing the number of virtual machines to lower costs, even if performance suffers.
C. Choosing a single cloud provider to simplify billing.
D. Using a combination of on-demand and spot instances to balance cost and performance.
Explanation:
Combining on-demand and spot instances can help optimize for cost and performance by using less expensive spot instances when available.