Consider the following statements regarding mitigation strategies for controlling eutrophication in freshwater bodies: 1. Riparian buffer zones of vegetation along water bodies help reduce eutrophication by trapping agricultural nutrient runoff. 2. Application of alum (aluminum sulfate) to eutrophic lakes precipitates phosphorus, making it unavailable for algal growth. 3. Artificially pumping pure nitrogen gas into the bottom layers of a lake suppresses algal blooms by displacing dissolved oxygen. Which of the statements given above is/are correct?

Options:

• A: 1 and 2 only
• B: 2 and 3 only
• C: 1 and 3 only
• D: 1, 2 and 3

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