When US Annual Energy Use and Gross National Product (GNP) Are

When U.S. annual energy use and gross national product (GNP) are graphed, the two graphs rise at the same rate until the mid- east oil shocks of the 1970s, after which

A) GNP keeps rising while energy use levels off due to global warming.
B) total energy use increases without a similar increase in GNP, because of increased oil imports.
C) GNP levels off while energy use keeps rising due to technological stagnation.
D) GNP keeps rising while energy use begins to level off due to increased energy efficiency.
E) energy use decreases due to declining fossil fuel supplies.