WhizLabs is developing two new web applications. For each of the applications, WhizLabs created a multi-stage CI/CD pipeline for the deployment at development, test, and production environments. WhizLabs decided to use Azure KeyVault for storing secure keys and connection strings for these applications. 
According to the good practice, how many vaults do they need to create to store all the secure information that is required?

Answer options:

A.1
B.3
C.2
D.6
E.4
F.9

Correct Answers:D 
According to the good practice for the web applications, we need to create one vault for each application for each environment. We have 2 applications that are deployed to 3 environments each. We will need to create 2x3=6 new KeyVault vaults. 
Of course, you can store all these secrets and connection strings in one vault. However, if you do that, you will increase your security vulnerability considerably. 
All other Options are incorrect. 
For more information about evaluate and configure vault solutions, please visit the below URL: 

https://docs.microsoft.com/en-us/learn/modules/manage-secrets-with-azure-key-vault/3-creating-vaults-storing-secrets