Which of the following statements define a namespace?

Which of the following statements define a namespace?
A . The namespace is a combination of the user and the app.
B . The namespace is a combination of the user, the app, and the role.
C . The namespace is a combination of the user, the app, the role, and the sharing level.
D . The namespace is a combination of the user, the app, the role, the sharing level, and the permissions.

Answer: A