Answer:
Option A. The reader is left questioning Tristan's decision to undertake something that might jeopardize his getting a job.
Explanation:
In the story, readers are left to wonder how the story will end after Tristan gets a task that might jeopardize his getting a job.
In this case, readers might have these questions:
What will happen next?
What happens if he is discovered?
This gives suspense to the story.