A complain about the useless efforts and investments in new sources of energy.
B celebrate the fact that oil has been the world’s cheapest form of energy ever known.
C support the worldwide view that oil is the only possible source of energy for the future.
D prove that oil production is large enough to supply all the world’s energy needs for the next 150 years.
E stress the relevance of oil in the history of civilization and the need for alternative energy sources.