You create a new canvas app and want to share it. 
What permissions for your app can you assign to the individuals and groups?

Answer options:

A.Admin
B.Co-owner
C.Publisher
D.User
E.App user

Correct Answers: B and D 
Power Apps provides two access level permissions you can assign to the users during canvas app sharing: Co-owner — individuals or groups with this permission can run, edit, and share the app. But they cannot delete it or change the app’s owner.
User — individuals or groups with this permission can run the app. But they cannot change it.
By default, all users have User permissions. You can promote them to Co-owner status during the app`s sharing. 
If you assign the permissions to the security group, everybody will have the assigned permission level. Additional to the group assignment, you can promote individuals in the group to another level. If you share your app with a large group, the best way is to use Azure AD groups. 

All other options are incorrect. 
For more information about canvas app sharing, please visit the below URLs: 

https://docs.microsoft.com/en-us/learn/modules/manage-apps-in-powerapps/2-share-apps
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/share-app