This scenario describes a situation where a user has already successfully logged into the system (i.e., has been authenticated) but cannot access a particular network resource (the shared folder). This falls under the concept of authorization, which determines what actions or resources a user is permitted to access after authentication.
"Authorization is the process of granting or denying access to network resources once the user has been authenticated." - CompTIA ITF+ Official Study Guide Authentication verifies the identity of the user (e.g., username and password).
Authorization controls access rights (e.g., shared folders, files).
Accounting tracks user activity (e.g., audit logs).
Non-repudiation ensures actions or transactions cannot be denied later.
Therefore, the correct answer is B: Authorization.