The correct answer is Active-active cluster deployment. In an active-active setup, multiple systems run the same critical applications and services simultaneously; this ensures that if one system fails, the other can immediately take over the workload with no service disruption. This is the best solution for environments that require very high availability because there's no failover downtime. Active-passive deployment designates a standby system that only comes online in the event of a primary system failure, resulting in some downtime during failover. Both hot site and cloud site are disaster recovery solutions meant to resume operations after a disruptive event and may involve some delay due to the restoration process, which does not fulfill the near 100% uptime requirement like an active-active setup does.