You need to implement a solution by using Azure services

You manage an application running on Azure Web Sites Standard tier. The application uses
a substantial amount of large image files and is used by people around the world. Users
from Europe report that the load time of the site is slow. You need to implement a solution by
using Azure services. What should you do?

A.
Configure Azure blob storage with a custom domain.

B.
Configure Azure CDN to cache all responses from the application web endpoint.

C.
Configure Azure Web Site auto-scaling to increase instances at high load.

D.
Configure Azure CDN to cache site images and content stored in Azure blob storage.

Explanation:
Ref: http://azure.microsoft.com/en-us/documentation/articles/storage-custom-domainname/