Where should you input the value for the AZURE_CREDENTIALS variable in the "Azure Login" step? ( the task is being run in GitHub actions instead of azure pipelines). 

Answer options:

A.Add a secret variable to the Azure DevOps Pipeline Library.
B.Add as an environmental variable to "env: " block in the script.
C.Add to the secretes section in the GitHub project Settings.
D.Stored as a Github secretes in Azure Key Vault.

Answer – C 
GitHub has a Secrets section in Project Setting to store secrets. The AZURE_CREDENTIALS variable is stored in the Secrets section. It contains Azure service principal in the form of a JSON object. 

Option A is incorrect since we are not using the Azure DevOps pipeline. 
Option B is incorrect since it is a secret that should not be store in plain text. 
Option D is incorrect since we are using GitHub to store secrets for this workflow. 
For more information about the configuration of CI/CD with GitHub Actions, please visit the below URL- 

https://docs.microsoft.com/en-us/azure/app-service/deploy-github-actions