Countries whose electricity grids are heavily dependent on renewable energy—Sweden, for instance, obtains over 65% of its energy from such sources—often struggle to meet consumer demand during peak hours (times of the day when electricity use is very high). Concerns about electrical supply limitations have led some nations to utilize demand-response systems (DRS) that motivate consumers to change habits through lower electricity prices during off-peak hours. These efforts reflect an assumption that
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Verbal·Information and Ideas·Inferences
mediumWhich choice most logically completes the text?
A
patterns of electricity use are shaped in part by consumer discretion.
B
the success of DRS will prompt other nations to develop renewable energy sources.
C
the use of DRS will guarantee that the supply of electricity remains sufficient.
D
increased reliance on renewable energy will be possible in the future.