Lorraine is studying the effects of polluted rain. A common kind of polluted rain has acid in it. She has some samples of a kind of rock called limestone. She runs pure water over one sample. She pours water with acid in it over the second sample. After a while, the second sample begins to break apart, but the first sample does not. What does Lorraine's experiment show?

that acid rain can dissolve limestone faster than regular rain

the correct answer is b

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