Planning to distribute the query load through load balancing is a strategic approach that can effectively mitigate the issue without extensive downtime or resource investment. It addresses the immediate cause--high query loads--by distributing these loads more evenly across the system or additional resources.
Option A is incorrect because while increasing physical memory may provide temporary relief, it does not address the root cause of high query loads.
Option B is incorrect because a complete database redesign, while potentially beneficial, is a long-term and resource-intensive solution that may not quickly resolve the immediate issue.
Option D is incorrect because advising users to avoid using the database during peak hours is impractical and does not solve the underlying technical problem.