Which of the Following Statements Is Correct

Which of the following statements is correct?

A) Until recently,the United States was committed to clean,renewable energy sources.
B) In 2017,the United States produced nearly 60 percent of the world's supply of ethanol for fuel.
C) Some scientists claim that the energy efficiency of growing corn for fuel may even result in an energy loss (considering the use of fertilizer,etc. )
D) Ecologists are concerned about the potential land use changes that could indirectly threaten the Amazonian rain forests and the Pantanal of Brazil because of the expansion of its biofuel program.
E) All of the above are correct.