Budget Lines The Following Questions Refer to the Following Diagram, Which Shows

Multiple Choice

Budget Lines

The following questions refer to the following diagram, which shows the budget lines faced by a consumer last year and this year.

-Refer to Budget Lines.The only situation where we can conclude that this consumer's tastes must have changed is when we observe him

A) buying B last year and buying A this year.
B) buying D last year and buying A this year.
C) buying B last year and buying C this year.
D) buying D last year and buying C this year.