please answer the following multiple choice

Open wi IMG_5468.jpeg 21 of 44 The demand and supply of unskilled labour are estimated by Ld = 550 - 25W and Ls = -500 + 50W, respectively, where L is millions of hours of labour and W is the wage rate. If the government introduces a minimum wage of $18, the surplus of labour would be Select one: OA none of the choices O B 225 OC 75 OD 50 Unsure