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Advanced Placement (AP), 28.04.2021 01:00 gfdsgfd5654

An ecologist suspects that an otherwise healthy forest ecosystem experienced an unusually high level of acid deposition during a snowy winter. Which of the following should the ecologist measure to help confirm her hypothesis? 1.The numbers of malnourished and/or poisoned trees

2.The aluminum concentration in the soil

3.The pH of the snowmelt

I only
II only
II and III only
I, II, and III

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