The Unemployment Rate Is the Number of Unemployed People

The unemployment rate is the number of unemployed people

A) divided by the number of people who are working.
B) divided by the total working-age population.
C) divided by the sum of the number of people who are working and the number of people who are looking for work.
D) and the number of people working fewer than their desired number of hours, divided by the number of people who are working or looking for work.