Carlos is planning an argumentative research essay about maintaining healthy forests in the United States. His initial research question is "How many forests are there in the United States?” He decides that the question is too narrow. How can Carlos rewrite the question to improve his research?

Where in the United States are healthy forests lacking proper care?
Who is responsible for maintaining healthy forests in the United States?
How can we develop a plan to maintain healthy forests in the United States?
Why is there a lack of focus on maintaining healthy forests in the United States?