Answer: marginal utility of ice cream cones to the marginal utility of ice cream sandwiches.(A)
Step-by-step explanation:
Indifference curve is the graph showing the combination of two goods that provide the consumer equal utility and satisfaction. Every point on the indifference curve shows that a consumer is indifferent with regards to the two goods and all points will give him the same utility.
The slope of the indifference curve is also called the marginal rate of substitution and it declines as the quantity of X rises relative to the quantity of Y.