The correct answer is A. Implementing Amazon RDS Proxy will help manage the connections efficiently by pooling and reusing existing connections, which reduces the overhead of opening and closing connections frequently. Configuring a read-only endpoint for RDS Proxy allows the application to distribute read-only requests effectively across the Aurora replica instances. This solution enhances the application's reliability during high traffic periods by preventing the database from being overwhelmed with too many connections. Options B, C, and D introduce changes that may not address the core issue of frequent short-lived connections as effectively as RDS Proxy does.