【单选题】During recessions, GDP falls and unemployment increases. Why might the actual output produced not fall as much as officially measured GDP during a recession?
A.
There is an increase in involuntary part-time employment, the output from which is not accounted for in GDP.
B.
Workers who became unemployed during the recession may produce goods in the underground economy.
C.
Unemployment benefits to laid off workers will allow them to purchase nearly as much output as before.
D.
Laid off workers may start their own businesses, but profit income from self-employment is not accounted for in GDP.