Which of the following access level would you provide for the test-admin group?

Answer options:

A.Reader
B.Collaborator
C.Contributor
D.Owner

Answer – D 
Since this group also needs permissions to edit package feeds, we need to assign the owner role. 
Below are the access levels given in the Microsoft documentation- 

Since this is the right access level, all other options are incorrect. 
For more information on sharing and securing packages, please visit the below URL- 

https://docs.microsoft.com/en-us/azure/devops/artifacts/feeds/feed-permissions?view=azure-devops