A the deficit in oil for industrial use is the only issue the governments need to worry about.
B the end of oil supplies will mark the decline of modern civilization as we know it today.
C the most important event in the history of oil extraction was the day the price of this commodity reached a peak.
D it is absolutely essential to be aware of the point at which a decrease in the need for oil will happen.
E it is more valuable to know when a decrease in oil production starts than to know when no more oil can be extracted.