The table presents units produced, value of output and the number of workers employed in an industry across three years. year 1: output $10$ (units, millions), output value $10$ ($\$ millions$), number employed $5$ (000) year 2: output $21$, output value $25$, number employed $7$ year 3: output $32$, output value $40$, number employed $8$ What conclusion can be drawn from the table?
- AInflation has increased.
- BProductivity has increased.
- CProfit has increased.
- DWorking population has increased.