GMAT Critical Reasoning (CR) | Re: In the year following an 8-cent increase in the federal tax

Hi,
In option D, the phrasing is the "for the year following the tax increase". Doesn't that mean the argument is talking about the next year? Since what happens in next year is irrelevant to the argument, I eliminated this choice.
The choice would have made complete sense had it said "during the year of tax increase". Am I thinking in the wrong direction or thinking too much?