Suppose Lizzie consumes soda and pizza. If the last bottle of soda she drinks provides 100 units of utility per dollar while the last slice of pizza she eats provides 300 units of utility per dollar:. a. the demand curve for soda must have shifted outward.
b. the demand curve for pizza must have shifted inward.
c. Lizzie should buy more pizza and less soda to maximize her utility.
d. the indifference curve for soda and pizza must have rotated inward.
e. the marginal rate of substitution between soda and pizza equals 3.

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