Contoso Ltd. is a global e-commerce company running its online store on Azure. The application consists of: - Frontend: Azure App Service (Windows) in West US. - Backend: Azure Kubernetes Service (AKS) cluster in West US. - Database: Azure SQL Database (General Purpose, S2) in West US. - Cache: Azure Cache for Redis (Standard C1) in West US. - Storage: Azure Blob Storage (LRS) for product images.

Business continuity requirements: - RPO: 5 minutes for the database. - RTO: 1 hour for the entire application. - The solution must survive a complete West US region outage. - Budget is limited; minimize additional costs.

What should you recommend as the primary DR strategy?