Select the event or events if they are a long term effect.A. A large, fast-flowing river is cloudy and muddy for a few days after 2 tons of soil is spilled by a barge.B. People who live near an oil refinery are advised to avoid outdoor activity for a week after a smokestack filter malfunctions and releases toxic chemicals.C. A nuclear energy accident results in immediate and permanent evacuation of a 20-mile radius because of radioactive contamination.D. An oil spill in the ocean coats penguins' feathers with oil until volunteers can clean them up.

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