Let $N , Q$ , And $U$ Denote, Respectively, the Working Age Population, the Labour Force, and Working

Let $N , Q$ , and $U$ denote, respectively, the working age population, the labour force, and the number of unemployed. The participation rate is defined as

A) $\frac { Q } { U }$ .
B) $\frac { Q } { N }$ .
C) $\frac { E } { Q }$ .
D) $\frac { U } { Q }$ .
E) $\frac { N } { U }$ .