Which Statement(s) Describe(s) the Unemployment Rate? I

Multiple Choice

Which statement(s) describe(s) the unemployment rate? I. The unemployment rate includes those people who do not have a job and have ended their job search.
II) The unemployment rate counts as employed those people who may be only working part-time.
III) The unemployment rate is the percentage of the entire U.S. population that does not have a job but is searching for one.

A) I only
B) II only
C) I and II only
D) III only