题目选项分析

In the next decade, a large percentage of municipalities throughout the country will experience power failures if they do not modernize their electrical substations. The vast majority of substations in the country already handle currents between 60% and 80% of their maximum capacity, and currents are expected to rise, perhaps by as much as a factor of 3 in the next decade, because of population increase and the increased demand from both industry and electronics in individual homes.

Which of the following is an assumption of the above argument?

【选项】Many electrical substations in operation today are old, and have several aged components that could break down, leading to power failures, even if current levels don't increase substantially.