The correct answer is C. When President George H.W. Bush restricted new sources of offshore dilling in the 1990s, he wanted to prevent another disaster like Exxon Valdez.
The Exxon Valdez disaster was an oil spill caused by the oil tanker Exxon Valdez after running aground on March 24, 1989, with a cargo of 41 million liters of crude oil, in Prince William Sound, Alaska, dumping 37,000 tons of hydrocarbon.
Alaska experienced the worst ecological tragedy in its history, by running the oil tanker and pouring millions of liters of oil that expanded over 2,000 kilometers of coastline. To clean the oil slick, vacuum cleaners, pressurized hot water hoses were used, the oil that still contained the Exxon Valdez was transferred to another oil tanker. The damage to the wildlife that occurred in this area is still being studied.
The spill led to the approval of new environmental legislation in the United States (Oil Pollution Act 1990, passed during George H.W. Bush’s administration).