The correct answer is D) The formation of OPEC encouraged Oklahoma to rapidly develop its oil industry.
The impact that the formation of OPEC had on the state of Oklahoma was that "The formation of OPEC encouraged Oklahoma to rapidly develop its oil industry."
OPEC stands for the Organization of Petroleum-Exporting Countries and is formed by important countries that produce a lot of oil such as Saudi Arabia, Kuwait, Venezuela, Iran, and Irak. It was formed in September 1960, in Baghdad. They represent a solid group of oil exporters that are able to fix the petroleum price worldwide.
When the OPEC declared an oil embargo to the United States in the 1970s, places such as Oklahoma had to work extra time to increase oil production.
