Stimulus
Prominent government officials have denied that their policies have produced serious environmental degradation. But the facts show otherwise. Last year, at the urging of certain mining companies, the government repealed a long-standing provision prohibiting the dumping of mining wastes into streams. Since that time, buried under bulldozed mining wastes. The argument relies on
What this question is testing
Your task
Find the assumption the argument requires in order for its conclusion to hold.
Common trap
Answers that would help the argument but aren't strictly required (sufficient, not necessary).
Winning move
Negate each choice — the right one breaks the argument when negated.
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