The two actions that would have a positive impact on the environment from your list are:
C. Establishing a State Park - This can help preserve natural habitats, protect biodiversity, and provide recreational areas for the public.
Renewable energy source - Utilizing renewable energy sources (not explicitly listed but implied in your options) means reducing reliance on fossil fuels, which helps decrease greenhouse gas emissions and mitigates climate change.
The other options (A, B, and D) are harmful to the environment.