Answer:
The answer is: Shasta, who is waiting to be recalled to a job from which she has been laid off.
Step-by-step explanation:
To be considered unemployed, an individual must be currently out of a job but actively seeking one. Individuals that are not actively seeking a job can still be considered unemployed if: they are waiting to start a new job within 30 days or are waiting to be recalled from layoff.
Mary is currently working, so she can not be considered unemployed.
Karen is not currently working but she is not looking for a job either, so she can not be considered unemployed.
Shasta on the other hand, doesn't have a job but is waiting to be recalled by a former employer.