The correct answer is A. Create a Progress Indicator component that displays the flow's relevant stages, as stated in the uploaded study guide.
The problem described is not with the Screen Flow's logic itself; it is with the user's inability to understand how much of the multi-step process remains. The study guide addresses this by adding a visual Progress Indicator.
A progress indicator gives users an immediate representation of their current position within the flow and the stages that remain. That directly addresses the anxiety caused by uncertainty about completion.
Option B refers to a Status Tracker, but the study guide does not identify that as the appropriate component for this use case.
Option C introduces Salesforce Path with Guidance for Success. Path is used for stage-oriented record processes, whereas the question specifically concerns a custom multi-step Screen Flow. Adding Path would therefore not directly solve the progress-visibility issue identified in the scenario.
The UX principle represented by the answer is visibility of progress. In longer interactions, users should be able to understand where they are and how much work remains. A Progress Indicator makes that process state visible without forcing users to infer it.
Study Guide reference/topics: Screen Flow, Progress Indicator, multi-step processes, process visibility, Declarative Design.