The labour force in Canada just added 250,000 workers (a supply factor), which expands its potential output. But actually expanding output requires what? Multiple select question. Those workers find jobs where their talents are used optimally Consumers and businesses desire to purchase more than they currently do Workers already in the labour force retire to give up their places for the new workers Firms are willing to hire workers even if the marginal cost of hiring exceeds the marginal revenue of the extra worker