You deployed a web app named App1 to the West US region. To back up App1 while minimizing cost, which of the following storage accounts should you use as the backup target?

The correct answer is storage2 because it is a Locally-Redundant Storage (LRS) account in the West US region. LRS is the most cost-effective replication strategy. Since App1 is already deployed in West US, using an LRS account in the same region minimizes data transfer costs and latency for backups. storage1 (Geo-Redundant Storage in West US) is more expensive due to geo-replication, which is not required for a cost-minimized backup within the same region. storage3 (LRS in East US) incurs cross-region data transfer costs, increasing expenses. storage4 (Geo-Redundant Storage in East US) is the most expensive option, combining cross-region data transfer with geo-replication, making it unsuitable for cost minimization.