Answer:C. full efficiency in this market could be achieved even without reallocating workers between the two markets.
Step-by-step explanation:
The marginal product of labour is the additional value that will be gained from production from employment of additional labour. The Entrepreneur will be willing to employ additional labour if the wages is lower than the marginal productivity and efficiency will only be achieved at that point.
Moving the labour from to market will not achieved efficiency in either market, for the wage rate is higher than the marginal product of labour in both market.
Increasing wage rate will reduce the efficiency and there is need to increase efficiency by making the marginal product of labour to be higher than labour rate.