Answer:
The correct answer is letter "A": utility.
Step-by-step explanation:
The Indifference Map or Indifference Curve determines the combination of two goods that will provide equal satisfaction according to their utility. If you want more of one good and less of another you would be willing to trade some of one for more of the other. Plotted in a graph's upper right quadrant an indifference curve shows the curve on which changing amounts of a product create equal satisfaction levels.