A Moving to another question will save this response. Question 8 On the production possibilities frontier, the presence of scarcity is represented by a, the fact that there are only two goods in the diagram. Ob. technological progress. c. the amount of the good on the horizontal axis forgone. d. the fact there are attainable and unattainable points. A Moving to another question will save this response. MAY 24 tv♫♫ a MacBook Air