Table 2 the Figures in the Table Below Are Taken from from the Statistics

Table 2. The figures in the table below are taken from the statistics office in a fictional country called Exland. $\begin{array}{|l|r|}\hline \text { Number of workers employed } & 8,400 \\\hline \text { Frictional unemployment } & 250 \\\hline \text { Structural unemployment } & 350 \\\hline \text { Cyclical unemployment } & 600 \\\hline \text { Discouraged workers } & 400 \\\hline \text { Adult population } & 12,000 \\\hline\end{array}$
Refer to table 2. What is the unemployment rate in Exland?

A) 12.5 per cent.
B) 15 per cent.
C) 16 per cent.
D) 24 per cent.