Which pricing tier plan should you recommend?

Your company has an Azure subscription. You plan to deploy 10 Web Apps.
You have the following requirements:
Each Web App has at least 15 GB of storage.
All Web App can use azurewebsites.net.
You need to deploy the 10 web apps while minimizing costs.
Which pricing tier plan should you recommend?

A.
Standard

B.
Free

C.
Basic

D.
Shared

Explanation:
https://azure.microsoft.com/en-us/pricing/details/app-service/