The developers at your company are building a static web app to support users sending text messages. The app must meet the following requirements:
* Website latency must be consistent for users in different geographical regions.
* Users must be able to authenticate by using Twitter and Facebook.
* Code must include only HTML, native JavaScript and jQuery.
* Costs must be minimized.
Which Azure service should you use to complete the architecture? To answer, drag the appropriate services to the correct locations. Each service may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.

Correct Answer:

Explanation

Box 1: Azure App Service plan (Basic)
With App Service you can authenticate your customers with Azure Active Directory, and integrate with Facebook, Twitter, Google.
Box 2: Azure Functions
You can send SMS messages with Azure Functions with Javascript.
Reference:
https://docs.microsoft.com/en-us/azure/active-directory-b2c/partner-whoiam
https://www.codeproject.com/Articles/1368337/Implementing-SMS-API-using-Azure-Serverless-Functi