Which factors have the greatest impact on regional oil production? choose all that apply. marpol opec political conflict supply and demand

The answers to this is OPEC and Political conflict.

The Organizations of Petroleum exporting countries (or OPEC) is a group insisting of 12 of the world's major oil-exporting nations. It was founded in 1960. 

There were political conflict because it was basically leading cause of war especially since it was the main cause the war in the Middle East, the main purpose of oil in the Middle East is to create transportation which later on turned into part of terrorist where they use transportation to make their attacks. they also used oil to make their ammo. 

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Answermost of the time it would be ground into fine sediment,and sometimes they are carried away from the original location;

The answer to the first one is barometer.