The graph shows US energy consumption from 1900 to 2000. A line graph showing U S energy consumption from 1900 to 2000. X axis is labeled Year beginning at 1900 and ending at 2000 in increments of 10 years. Y axis is Quadrillion B T U, in increments of 5 starting at 0 and ending at 40. Fuel wood starts at 0 in 1900, increasing to about 4 in 2000. Hydroelectric, 1900, 0, 2000 5. Nuclear, 1900 below 0, 2000 at 10. Coal, 8 in 1900, 25 in 2000. Oil, 0 in 1900, almost 40 in 2000, Natural gas, 0 in 1900, 25 in 2000.

The chart shows a decline in oil consumption in the 1980s. This decline was a result of
A. the Mideast oil crisis.
B. the Vietnam War
C. the long-term recession of the 1960s.
D. the success of the environmental movement.