A company wants to deploy a web-based application onto Azure. The application is going to be hosted on a set of Azure virtual machines located in different regions. They want to implement a strategy of Blue-Green deployment for all future application updates. You also want to implement an Azure DNS load balancing solution to implement Blue-Green deployments. 
Which of the following would be implemented as a feature to enable Blue-Green Deployments?

Answer options:

A.Automatic updates
B.Rolling updates
C.Weighted routing method
D.Priority routing method

Answer – C 
When you are implementing the Azure Traffic Manager as the DNS routing service, you can use the Weighted routing method for implementing Blue-Green deployments. 

Based on the implementation of using Azure Traffic Manager for Blue-Green deployments, all other options are incorrect. 
For more information on the article itself, please refer to the following link- 

https://azure.microsoft.com/en-in/blog/blue-green-deployments-using-azure-traffic-manager