The correct answer is a. Esmerelda but not Tabitha.
According to the Bureau of Labor Statistics (BLS) definitions, an individual is considered "employed" if they have done any work at all for pay or profit during the survey reference week. This includes individuals working in a family business, even if they do not receive pay.
Tabitha, on the other hand, is considered "unemployed" because she was not working due to illness (strep throat) during the reference week.