A data center manager is implementing a continuous improvement strategy to enhance the efficiency of their server utilization. They have gathered data indicating that their current server utilization averages 60%, with peak usage reaching 85%. The manager aims to reduce energy consumption by 20% while maintaining service levels. To achieve this, they consider three strategies: consolidating workloads onto fewer servers, optimizing cooling systems, and implementing virtualization technologies. Which strategy would most effectively contribute to the goal of reducing energy consumption while ensuring that server utilization does not drop below 70% during peak hours?