Which TWO components can be used to notify a user about an incident update?
Comments trigger notification events for the end user.
Why this answer
Customer Comments (A) are correct because they are visible to the caller/end user on the incident record and, when added, can trigger outbound communication such as an email notification to the user, thereby notifying them of an update. Email Notification (E) is correct because it is the mechanism that actually sends an email to the user (for example, via a notification configured on the incident table when a comment is added or the record is updated). Assignment Rule (B) is not correct because it only automatically sets fields such as assignment group or assigned user during insert/update and does not notify users.
Work Notes (C) are not correct because they are internal-only and are not visible to the end user. UI Policy (D) is not correct because it only dynamically changes form field behavior (visible, mandatory, read-only) on the client side and does not send notifications.
Exam trap
CIS-ITSM often tests the visibility distinction between Customer Comments and Work Notes — the trap is assuming Work Notes notify the user, when they are internal-only.