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　　Just under a decade ago, America seemed on the cusp of an auto revolution. Faced with a slumping economy and skyrocketing oil prices, drivers were turning away from costly, gas-guzzling SUVs—think of the Hummer brand that General Motors killed in 2010—and toward hybrid-electric cars that promised, over time, to save them millions at the pump. The technology was poised to go mainstream,thanks in part to a freshly elected President Obama, who promised to make it cheaper to produce greener cars—which in turn would make it cheaper to buy them.

　　Which of the following one is true according to the first paragraph?

　　(A) The dramatic rise of the oil price has spelt the death of Hummer.

　　(B) The President Obama has made the auto revolution of hybrid-electric cars.

　　(C) The price of gasoline has made the cusp of General Motors.

　　(D) The technology has made the gasoline much cheaper than before.

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