Which of the Following Statements Characterizes the Energy Needs and Resources

Which of the following statements characterizes the energy needs and resources that the United States faced in the late 1960s and early 1970s?

A) The United States continued to produce enough petroleum to meet all its needs,but the price was rising sharply.
B) The United States was rapidly substituting nuclear and hydroelectric power for most of its energy needs except gasoline.
C) The United States,once the world's leading producer of oil,had become heavily dependent on imported oil.
D) American output of petroleum had declined dramatically,forcing the United States to buy almost all of its oil from Africa.