The other things did OPEC do in 1973 was it raised the price of oil. Thus first option is correct.
The full of OPEC is Organization of the Petroleum Exporting Countries whose work is to establish an international organization that was founded to give member governments technical and financial assistance as well as to coordinate their petroleum policies.
The price of oil increased in 1973 as a result of the oil embargo imposed by OPEC. On October 19, 1976, the Organization of Petroleum Exporting Countries (OPEC) decided to halt oil exports to the United States.
Over the next six months, oil prices quadrupled as a result of the oil embargo. The embargo against the United States, which permanently altered the price of oil, was approved by all 12 members of the organization.
Thus option 1st is correct.
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