What is a directive that has a one-time or brief nature and includes a self-canceling provision?

The correct choice is a notice. A notice is a type of directive that is intended for a specific, often short-term, purpose and typically includes a self-canceling provision. This means that the notice is effective for a limited time, after which it automatically becomes void or irrelevant, completing its intended purpose without the need for further action.

In professional settings, notices are often used to communicate important information or instructions that are time-sensitive or related to specific events. For example, a notice might announce a temporary change in procedure or an upcoming event that does not require ongoing attention once it has been experienced or achieved.

While memos, policies, and circulars serve valuable functions in communication and governance, they differ from notices in their intent and duration. Memos are usually more formal communications, policies are long-term guiding principles, and circulars often circulate information broadly without the same temporal limitations as a notice. These differences highlight why the nature of a notice, specifically its brief and self-canceling characteristics, make it the correct answer in this context.