Your company wants to develop and deploy a web application onto Azure. This is an e-commerce application. They want to track various user insights for their web application. Some of the essential requirements for gaining user insights are given below. Insights on to how many users complete a product purchase
Where do users churn the most from the application?
Are page load times affecting a user’s decision to continue using the application?
You plan to use Application Insights for all of the above requirements. 
Which of the following in Application Insights would you use for the following requirement? 
“Insights on to how many users complete a product purchase.”

Answer options:

A.Funnels
B.Cohorts
C.Impact
D.Retention
E.User Flows

Answer - A 
You can use Funnels to see whether users are completing multiple stages within your web application. 
The Microsoft documentation mentions the following. 

Since this is clearly mentioned in the Microsoft documentation, all other options are incorrect. 
For more information on Application Insights – Funnels, please refer to the following link- 

https://docs.microsoft.com/en-us/azure/azure-monitor/app/usage-funnels