You need to deploy the solution to Azure

You are migrating an existing solution to Azure.
The solution includes a user interface tier and a database tier. The user interface tier runs on multiple virtual
machines (VMs). The user interface tier has a website that uses Node.js. The user interface tier has a
background process that uses Python. This background process runs as a scheduled job. The user interface
tier is updated frequently. The database tier uses a self-hosted MySQL database. The user interface tier
requires up to 25 CPU cores.
You must be able to revert the user interface tier to a previous version if updates to the website cause technical
problems. The database requires up to 50 GB of memory. The database must run in a single VM.
You need to deploy the solution to Azure. What should you do first?

A.
Deploy the entire solution to an Azure website. Use a web job that runs continuously to host the database.

B.
Deploy the database to a VM that runs Windows Server on the Standard tier.

C.
Deploy the entire solution to an Azure website. Run the database by using the Azure data management
services.

D.
Deploy the user interface tier to a VM. Use multiple availability sets to continuously deploy updates from
Microsoft Visual Studio Online.