Suppose a person's utility is only a function of their consumption of diet soda and they do not care which brand, Diet Coke $($DC$)$ or Diet Pepsi $($DP$)$ they consume. Suppose further that $P_{DC}>PDC.$

Refer $to$ Scenario $4-2.If{P}_{DC}$ rises $to$ a point where $P_{DC}>P_{DP}$ then the consumption $ofDC$

falls from a positive amount $to$ zero.

falls from a positive amount $to$ another positive amount.

rises.

stays $at$ zero.