Carlos is the manager of a factory, Workers at the factory are assigned to one of two tasks, one of which requires skilled labour and one of which requires unskilled labour. Because skilled workers earn a higher wage than unskilled workers, everyone who applies for a job says they're skilled. Carlos's challenge is to figure out who is actually a skilled worker and who is an unskilled worker. Suppose that Carlos would like to use the economic concept of screening to separate out worker types. Which of the following scenarios illustrates this concept? O Carlos implements a test to determine whether applicants are stalled or not. O Carlos voluntarily pays all workers a higher wage in hopes of attracting and retaining more productive workers. O Skilled workers pay to take a certification course to demonstrate their ability. Suppose, instead, the manager considers paying efficiency wages to increase the factory's profitability. True or False; Elficency whyes are set equal to the average industry wage and are intended to weed out workers who are only interested in money. True O False