Question 18 1 pts At some point, if all factors of production are being used, it becomes impossible to generate additional output, so the AS curve becomes (two words, 1 mark). D Question 19 3 pts Three examples of people over 15 years of age. not participating in the labour force are and D Question 20 2 pls Two key macroeconomic Indicators that provide insight into the standard of living in an country are and