12. The unemployment rate is supposed to measure ________. It is an imperfect measure because ________.

A) the number of unemployed plus the number of discouraged searchers expressed as a percentage of the labour force; it excludes the discouraged searchers because Statistics Canada considers them as employed

B) the percentage of the working-age population who are unemployed; it is impossible to count everyone in the working-age population

C) the percentage of the labour force who are unemployed; it is impossible to count everyone in the labour force

D) the underutilization of labour resources; it excludes some underutilized labour and some unemployment is unavoidable

E) the underutilization of labour resources; it includes part-time workers and excludes discouraged workers