Triple

Target entity: Deepwater Horizon oil spill
Context triple: [Transocean, involvedIn, Deepwater Horizon oil spill]

• A. Deepwater Horizon oil spill chosen
  The Deepwater Horizon oil spill was a massive 2010 offshore drilling disaster that released millions of barrels of oil into the Gulf of Mexico, causing one of the worst environmental catastrophes in U.S. history.
• B. Prestige oil spill
  The Prestige oil spill was a major environmental disaster in 2002, when the oil tanker Prestige sank off the coast of Galicia, Spain, releasing thousands of tons of fuel oil and severely polluting the surrounding marine and coastal ecosystems.
• C. Torrey Canyon oil spill
  The Torrey Canyon oil spill was a catastrophic 1967 tanker disaster off the coast of Cornwall that released a massive amount of crude oil into the sea, becoming one of the first major environmental marine pollution crises and prompting significant changes in international maritime regulations.
• D. Exxon Valdez oil spill
  The Exxon Valdez oil spill was a catastrophic 1989 environmental disaster in Alaska’s Prince William Sound, where a supertanker ran aground and released millions of gallons of crude oil, causing massive ecological and economic damage.
• E. 1969 Santa Barbara oil spill
  The 1969 Santa Barbara oil spill was a massive offshore drilling accident off the California coast that released millions of gallons of crude oil, devastating marine and coastal ecosystems and helping catalyze the modern U.S. environmental movement.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.