Final answer:
Tonya would be most interested in the Brownfields program, which is aimed at cleaning and reusing previously contaminated sites, including transforming them into parks. The correct option is (d).
Step-by-step explanation:
Tonya, who believes her neighborhood needs a park and is considering a formerly hazardous site as a location, would be most interested in the Brownfields program. The Brownfields program specifically deals with the assessment, cleanup, and sustainable reuse of previously contaminated sites.
Unlike the Superfund program, which manages severely contaminated locations requiring intensive cleanup efforts, Brownfields projects often involve less seriously contaminated areas that can be safely renovated for public use, such as building a park.