What are the three strategies which local municipality is implementing in addressing the issue of lack of clean water?

1. Planting more trees. Trees could help in protecting a water source from inside the soil through its root, which could  answer the problem in lack of clean water
2. Imposing higher taxation system for the companies that dump their waste into our water source, so the government could receive fund to recycle the water in becoming useful again.
3. Advocate people through campaigns to not spending water more than they needed everyday

Ibelieve it's choice d.