Concept:Underemployment refers to workers who have jobs but are not fully utilized, such as part-time workers seeking full-time work.
Explanation:Part-time workers who desire full-time employment are already employed, though at reduced hours.
Because they have jobs, they are not classified as unemployed.
They are considered involuntary part-time workers and fall under the category of underemployment.
Underemployed persons are counted as part of the labour force and as employed, so they do not add to the official unemployment statistic.
Therefore, the correct description is that they are underemployed but do not contribute to the unemployment statistic.
Answer:B. Underemployed but do not contribute to the unemployment statistic.