To weaken the official's objection to the Ministry's decision, we need to find information that suggests the initial high costs of the underground wiring project can still result in cost-effectiveness or other benefits. Let's analyze the answer choices:
(A) Wiring roads has proved to be an effective means of preventing the accumulation of snow.
This statement provides support for the effectiveness of the underground wiring solution but does not address the official's objection regarding cost-effectiveness.
(B) Recent surveys indicate that ice-covered roads are the number one cause of car accidents in the winter.
While this information highlights a problem related to ice-covered roads, it doesn't directly address the cost-effectiveness of the wiring project.
(C) Last year, the Ministry of Transport spent a third of its budget on winter road maintenance in fuel, salt, and personnel.
This information suggests that a significant portion of the budget is currently allocated to winter road maintenance, which could potentially justify the initial high costs of the wiring project if it leads to cost savings in the long run. This option weakens the official's objection by showing the potential for cost-effectiveness.
(D) Several countries, which have already wired their roads, still use salt as an additional measure.
This information doesn't directly address the cost-effectiveness of the wiring project.
(E) The price of electricity, on which the underground wiring system runs, has been increasing steadily over the past ten years.
This option weakens the argument for the underground wiring project by highlighting the rising costs associated with it, which aligns with the official's objection rather than weakening it.
Among the given options, (C) provides information that weakens the official's objection by suggesting that the high initial costs of the wiring project may be justified if they lead to cost savings compared to the current expenses on winter road maintenance. Therefore, (C) is the most appropriate choice to weaken the objection.