What is the average gallons spilled in the largest oil spill?

• A. 300 million
• B. 500 million
• C. 600 million
• D. 450 million

Answer: (D)

The question tests understanding of the scale of the largest oil spills. The biggest spills release a huge amount of oil, on the order of hundreds of millions of gallons. Among the given options, the one that sits in that high-magnitude range best matches the expected size of the largest spill. So the choice that reflects that upper range is the best fit. Real-world estimates can vary depending on what is counted, but the key idea is that the largest spill involves hundreds of millions of gallons, not just a few hundred thousand.