Over the coming two months, the price of oil in Esteria is projected to increase by enough to approximately double the price paid by Esterian drivers for each gallon of gasoline or diesel fuel.
Maria, who lives and works in a large Esterian city, has no car, commutes on electric-powered public transit vehicles, and uses household power derived from hydroelectricity and natural gas. Since she does not use oil-based fuel in any of her everyday activities, Maria does not expect any significant impact on her own cost of living if the Esterian oil price jumps as projected.
Which of the following, if true, most weakens Maria's line of reasoning?
(A) Esteria's public-transit systems, including the one on which Maria makes her daily commute, are funded by a fixed-percentage tax charged on all purchases of gasoline or diesel fuel within Esteria.
Unless the prices of daily travel in Esteria's public-transit systems increases accordingly, it is not going to adversely impact on Maria's own cost of living.
Incorrect
(B) Groceries and other essential items must be transported into Maria's city on small-to-medium-sized diesel-powered trucks.
In such cases, transportation cost of grocery items will increase accordingly which may have cumulative effect on grocery prices which may in turn impact Maria's own cost of living.
Correct
(C) If the price of gasoline climbs as projected, many companies in Maria's city will allow employees who live in the surrounding suburbs to work from home one to two days per week.
This may impact many other persons other than Maria and their cost of living may be impacted but Maria's own cost of living may not be impacted by such changes.
Incorrect
(D) Newly enacted environmental legislation will increase by one-half the amount that Maria must pay for electrical power.
Since this is an additional burden which may impact Maria's cost of living but it is not impacted by oil prices. Therefore, it is not relevant to the argument or Maria's reasoning.
Incorrect
(E) The economists who have predicted the upcoming increase have been correct in nearly all of their recent predictions concerning the Esterian economy.
Despite the fact that economists may be correct in their prediction about oil price increases, this is not sufficient enough to prove her reasoning about her own cost of living since almost all of the items she uses do not depend on oil prices.
Incorrect
IMO B