What would be the recommended solution to grant mobile app access to sales users?

universal container plans to develop a custom mobile app for the sales team that will use salesforce for authentication and access management. The mobile app access needs to be restricted to only the sales team .

What would be the recommended solution to grant mobile app access to sales users?
A . Use a custom attribute on the user object to control access to the mobile app
B . Use connected apps Oauth policies to restrict mobile app access to authorized users.
C . Use the permission set license to assign the mobile app permission to sales users
D . Add a new identity provider to authenticate and authorize mobile users.

Answer: B