The unemployment rate may underestimate the true extent of unemployment if:

A.many part-time employees would like to work full time, but are unable to get the additional work.
B.employees increase the number of hours they work overtime.
C.there are a large number of people working in the underground economy.
D.people are pretending to look for work so that they can continue receiving unemployment benefits.

ANSWER:

A.many part-time employees would like to work full time, but are unable to get the additional work.