Answer: Option C
Step-by-step explanation: Usually the demand for the goods tends to be more elastic in long run rather than the short run. In case of oil, it is not a necessary good for the daily lives of the individuals and one can survive without it and can use alternatives.
Therefore, in the long run it is more elastic as individuals will move to the alternatives of oil if its price remains high.
Hence from the above we can conclude that the correct option is C.