Suppose That a Consumer's Income Triples $x$ And the Price Of $y$

Multiple Choice

Suppose that a consumer's income triples. However, at the same time, both the price of $x$ and the price of $y$ also triple. This consumer has experienced:

A) an increase in purchasing power.
B) a decrease in purchasing power.
C) no change in purchasing power.
D) a pivot in the budget constraint with an undetermined effect on purchasing power.