Your team needs to make use of NuGet packages in a project under Azure DevOps. The required NuGet packages are in a feed that required authentication. You have to ensure that the project can restore the NuGet package automatically. Which of the following can be used for this requirement?

Answer options:

A.An Azure Automation account
B.A service principal defined in Azure AD
C.An application object defined in Azure AD
D.An Azure Artifacts Credential Provider

Answer – D 
You can use Azure Artifacts Credential Provider to restore NuGet packages in your development workflow. 
This also present as a GitHub article. 

Since this is clearly mentioned, all other options are incorrect. 
For more information on Azure Artifacts Credentials Provider, please visit the following URL- 

https://github.com/microsoft/artifacts-credprovider