You have an Azure subscription that contains an Azure App Service app named App1 in a Standard App Service plan. App1 is accessed directly from the internet by using the following URL: https://app1.contoso.com. The Azure region that hosts App1 supports availability zones for App Service apps.

You need to recommend a redundancy solution for App1. The solution must meet the following requirements:

• Ensure that App1 is available if two availability zones fail.

• Minimize administrative effort.

• Minimize costs.

What should you recommend?