(12 in the following graph, S and D represent the supply and demand curves respectively, in the labour market. Refer to the graph to answer the question. Wages E15 E10 E7 D 0 100 125 200 275 300 Quantity When the wage in the market is set at $15: a. there is a surplus of 300 workers. b. there is a shortage of 100 workers. c. there is a surplus of 200 workers. d. there is a shortage of 275 workers