Which one of the following statement is correct: O a. The labour supply curve is downward sloping because the price of leisure decreases when wages are higher. O b. The intersection of labour supply and demand always determines the level of employment in the economy. O c. Usually the youth unemployment rate is lower than the aggregate unemployment rate because there are less young individuals willing to work. O d. labour income taxes create distortions in the labour market. O e. If wages are rigid, imposing taxes will not affect the level of employment in equilibrium