which best ensures user accountability for actions taken within a system or domain?

Of the following choices, which best ensures user accountability for actions taken within a system or domain?

A.
Identification

B.
Authentication

C.
Authorization

D.
Credentials

Explanation:
Uniquely identifying and authenticating users is the only way to ensure
accountability. Identification alone does not prove the user is who they claim to
be. After showing proper credentials, a user is authorized access to resources.