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 Web App. Use a web job that runs continuously to host the database.

B.
Configure Microsoft Visual Team Services to continuously deploy the user interface tier to the Azure Web
App service. Deploy the production builds and the staging builds of the user interface tier to separate slots.

C.
Deploy the entire solution to an Azure Web App. Use a web job that runs continuously to host the user
interface tier.

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